Computer MemSaver Needed on Uplander?
August 2nd, 2011, 7:56 PM
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Computer MemSaver Needed on Uplander?
When I go to change the battery on the '08 Uplander LS, should I use one of the 9V-battery powered Computer Memory Savers? One local mechanic told me definitely, but another said "why?....I've got nothing needing saving". In terms of special items, our LS has a OEM radio/disc player that flashes when everything is off, Stabilitrak etc., but nothing fancy. The device (according to YouTube demos) is only a lighter-socket plug wired through one Si diode (1N4002 or better) connected to a 9V (Neda 1604A) battery, which they say is enough voltage (the Si diode drops it about 0.5V) to retain the memories (except for some Chryslers and imports) during the battery change procedure.
August 21st, 2011, 5:25 PM
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I've read that the OEM radio will not operate when you swap batteries and that the memory saver is needed. Hopefully someone's tried it and will chime in. I'm going to swap a new one in soon since the Uplander can be a huge headache if the alternator or battery start dying and I don't want to wait until it's dead.
August 22nd, 2011, 9:04 PM
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A fellow member of another forum that I frequent is in GM management, he sent me the document below.
He also stated that he had poor results from those 9 volt "memory savers", he believes the voltage is too low... Here is the document:
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2662835
#08-08-44-023A: Information on Navigation Radio Not Displaying Accurate Vehicle Location after Radio Replacement, Power Loss or Battery Replacement - (May 23, 2011)
Subject: Information on Navigation Radio Not Displaying Accurate Vehicle Location after Radio Replacement, Power Loss or Battery Replacement
Models: 2012 and Prior GM Passenger Cars and Trucks
Equipped with Navigation Radio
This bulletin is being revised to update model years. Please discard Corporate Bulletin Number 08-08-44-023 (Section 08 - Body and Accessories).
The purpose of this bulletin is to inform technicians and customers that the Navigation Radio may not display the vehicle location icon on the map accurately after a radio or battery has been replaced or after battery power has been removed from the radio. The vehicle location icon accuracy may be degraded if the GPS signal is not available and the GPS displayed icon has a red line through it.
The Navigation Radio does not keep learned GPS information or gyroscope and vehicle speed signals stored when the battery power is removed from the radio. The Navigation radio continually uses GPS, gyroscope and vehicle speed data to maintain the vehicle location icon positioned accurately on the displayed map. There may be periods of time during a drive cycle when the GPS signal may not be available and the vehicle location icon still appears to be accurate. This is due to the radio having internal gyroscopes and receiving a vehicle speed signal to maintain accuracy if the radio had received a good GPS signal earlier in the drive cycle.
Normal driving will improve the accuracy of the vehicle location icon on the displayed map. It may be necessary for the vehicle to be driven up to 40 km (25 mi) with 15 left and 15 right turns while the vehicle location icon is matched to roads on the displayed map. Do not replace the radio for this condition.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2061934
Battery Disconnect Warning
Warning: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
For Vehicles equipped with OnStar® (UE1) with Back Up Battery:
The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF. Retained accessory power (RAP) should be allowed to time out or be disabled (simply opening the driver door should disable RAP) before disconnecting power. Disconnecting power to the OnStar® module in any way while the ignition is On or with RAP activated may cause activation of the OnStar® Back-Up Battery (BUB) system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The BUB is not rechargeable and once activated the BUB must be replaced.
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2068512
Battery Replacement
Removal Procedure
Warning: Refer to Battery Disconnect Warning in the Preface section.
Warning: Batteries generate hydrogen gas, which is extremely flammable and may explode violently if ignited by a spark or a flame. Battery acid is extremely corrosive and causes severe personal injury if the acid comes into contact with the skin, and blindness if the acid comes into contact with the eyes. In order to avoid severe personal injury, use extreme caution when servicing the battery or battery-related components.
Remove the underhood electrical center cover (1).
Remove the underhood electrical center mounting bolts (3).
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
Remove the front end sheet metal diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement.
Open the positive battery cable cover (5).
Loosen the positive battery cable nut (3).
Remove the positive battery cable from the battery.
Remove the battery hold down retainer bolt (3).
Remove the battery hold down retainer (2).
Note: Do not tip the battery more than 40 degrees.
Remove the battery (1).
Installation Procedure
Note: Do not tip the battery more than 40 degrees.
Install the battery (1) and ensure that the battery is positioned properly in the battery tray.
Install the battery hold down retainer (2).
Caution: Refer to Fastener Caution in the Preface section.
Install the battery hold down retainer bolt (3) and tighten to 17 N·m (13 lb ft).
Install the positive battery cable to the battery.
Install the positive battery cable nut (3) and tighten to 16 N·m (12 lb ft).
Close the positive battery cable cover (5).
Install the front end sheet metal diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
Install the underhood electrical center bolts (3) and tighten to 10 N·m (89 lb ft).
Install the underhood electrical center cover (2).
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2068444
Battery Negative Cable Disconnection and Connection
Removal Procedure
Warning: Refer to Battery Disconnect Warning in the Preface section.
Record all presets and theft codes from the radio.
Turn off all the lamps and accessories.
Turn the ignition OFF.
Loosen the negative battery cable (2) nut.
Remove the negative battery cable from the battery.
Installation Procedure
Note: Clean any existing corrosion from the battery terminal bolt and the battery cable.
Install the negative battery cable to the battery.
Caution: Refer to Fastener Caution in the Preface section.
Tighten the negative battery cable (2) nut and tighten to 16 N·m (12 lb ft).
Reprogram the radio presets. Refer to Radio Programming and Setup.
Re-initialize the power sliding doors. Refer to Rear Side Door Actuator Control Module Programming and Setup.
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2196318
Radio Programming and Setup
Each of the following service procedures require programming or setup procedures to be performed on the radio.
Radio Programming and Setup
Note: The radio setup files will configure the radio amplifier (if equipped), internal equalization settings, and program the vehicle identification number (VIN). Without the following setup procedure, the sound quality and volume of the radio may be degraded.
For Navigation radios, setup is completed using the scan tool and the VIN relearn procedure.
If exchanging the same radio, from one vehicle to another, the VIN from the vehicle receiving the radio needs to be programmed with the scan tool.
For the base radio, use the VIN relearn procedure available in Module Setup menu of the scan tool. After programming cycle the ignition key with the retained accessory power (RAP) disabled.
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 1819403
Rear Side Door Actuator Control Module Programming and Setup
Power Sliding Door Modules
The unlatching, opening, and closing of the power sliding door (PSD) is controlled by the power sliding door module (PSDM). There is one module for each sliding door. In order to continuously monitor the position of its respective sliding door, each module interprets and stores information it receives from the position sensors mounted in the associated power sliding door motor/clutch assembly.
Power Sliding Door Module Replacement and Initialization Procedure
Replacement of the PSDM requires that the Power Sliding Door System be disabled by removing the PSD 15-amp fuse. Once the PSDM has been replaced and the fuse installed, the following initialization procedure must be performed for both sliding doors in the following order:
Manually close and latch the power sliding doors.
Perform two complete Open/Closed cycles for each sliding door using any one of the following devices:
• Appropriate switch mounted in the overhead console
• Appropriate switch mounted to the B pillar
• Remote Transmitter
• Special functions of the scan tool
With a scan tool, verify that the PSD Open/Closed Position Learned parameter displays "Yes".
Operate the power sliding door to verify completion of the procedure. Refer to Power Sliding Door (PSD) Description and Operation .
Power Sliding Door Module Reprogramming
Service parts are programmed during the manufacturing process and no additional programming should be necessary. However, in the event that a software change to the PSD is implemented after the start of production, the PSDM can be reprogrammed using the service programming procedure. Refer to Service Programming System (SPS) .
Power Sliding Door Module Re-Initialization: May Be Due To Related Component Service
If the power sliding door module has been removed and re-installed, or if battery positive voltage or ground has been removed from the module for any other reason, follow the power sliding door module replacement initialization procedure.
© 2011 General Motors. All rights reserved.
He also stated that he had poor results from those 9 volt "memory savers", he believes the voltage is too low... Here is the document:
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2662835
#08-08-44-023A: Information on Navigation Radio Not Displaying Accurate Vehicle Location after Radio Replacement, Power Loss or Battery Replacement - (May 23, 2011)
Subject: Information on Navigation Radio Not Displaying Accurate Vehicle Location after Radio Replacement, Power Loss or Battery Replacement
Models: 2012 and Prior GM Passenger Cars and Trucks
Equipped with Navigation Radio
This bulletin is being revised to update model years. Please discard Corporate Bulletin Number 08-08-44-023 (Section 08 - Body and Accessories).
The purpose of this bulletin is to inform technicians and customers that the Navigation Radio may not display the vehicle location icon on the map accurately after a radio or battery has been replaced or after battery power has been removed from the radio. The vehicle location icon accuracy may be degraded if the GPS signal is not available and the GPS displayed icon has a red line through it.
The Navigation Radio does not keep learned GPS information or gyroscope and vehicle speed signals stored when the battery power is removed from the radio. The Navigation radio continually uses GPS, gyroscope and vehicle speed data to maintain the vehicle location icon positioned accurately on the displayed map. There may be periods of time during a drive cycle when the GPS signal may not be available and the vehicle location icon still appears to be accurate. This is due to the radio having internal gyroscopes and receiving a vehicle speed signal to maintain accuracy if the radio had received a good GPS signal earlier in the drive cycle.
Normal driving will improve the accuracy of the vehicle location icon on the displayed map. It may be necessary for the vehicle to be driven up to 40 km (25 mi) with 15 left and 15 right turns while the vehicle location icon is matched to roads on the displayed map. Do not replace the radio for this condition.
GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.
WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2061934
Battery Disconnect Warning
Warning: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.
For Vehicles equipped with OnStar® (UE1) with Back Up Battery:
The Back Up Battery is a redundant power supply to allow limited OnStar® functionality in the event of a main vehicle battery power disruption to the VCIM (OnStar®module). Do not disconnect the main vehicle battery or remove the OnStar® fuse with the ignition key in any position other than OFF. Retained accessory power (RAP) should be allowed to time out or be disabled (simply opening the driver door should disable RAP) before disconnecting power. Disconnecting power to the OnStar® module in any way while the ignition is On or with RAP activated may cause activation of the OnStar® Back-Up Battery (BUB) system and will discharge and permanently damage the back-up battery. Once the Back-Up Battery is activated it will stay on until it has completely discharged. The BUB is not rechargeable and once activated the BUB must be replaced.
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2068512
Battery Replacement
Removal Procedure
Warning: Refer to Battery Disconnect Warning in the Preface section.
Warning: Batteries generate hydrogen gas, which is extremely flammable and may explode violently if ignited by a spark or a flame. Battery acid is extremely corrosive and causes severe personal injury if the acid comes into contact with the skin, and blindness if the acid comes into contact with the eyes. In order to avoid severe personal injury, use extreme caution when servicing the battery or battery-related components.
Remove the underhood electrical center cover (1).
Remove the underhood electrical center mounting bolts (3).
Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
Remove the front end sheet metal diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement.
Open the positive battery cable cover (5).
Loosen the positive battery cable nut (3).
Remove the positive battery cable from the battery.
Remove the battery hold down retainer bolt (3).
Remove the battery hold down retainer (2).
Note: Do not tip the battery more than 40 degrees.
Remove the battery (1).
Installation Procedure
Note: Do not tip the battery more than 40 degrees.
Install the battery (1) and ensure that the battery is positioned properly in the battery tray.
Install the battery hold down retainer (2).
Caution: Refer to Fastener Caution in the Preface section.
Install the battery hold down retainer bolt (3) and tighten to 17 N·m (13 lb ft).
Install the positive battery cable to the battery.
Install the positive battery cable nut (3) and tighten to 16 N·m (12 lb ft).
Close the positive battery cable cover (5).
Install the front end sheet metal diagonal brace. Refer to Front End Sheet Metal Diagonal Brace Replacement.
Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection.
Install the underhood electrical center bolts (3) and tighten to 10 N·m (89 lb ft).
Install the underhood electrical center cover (2).
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2068444
Battery Negative Cable Disconnection and Connection
Removal Procedure
Warning: Refer to Battery Disconnect Warning in the Preface section.
Record all presets and theft codes from the radio.
Turn off all the lamps and accessories.
Turn the ignition OFF.
Loosen the negative battery cable (2) nut.
Remove the negative battery cable from the battery.
Installation Procedure
Note: Clean any existing corrosion from the battery terminal bolt and the battery cable.
Install the negative battery cable to the battery.
Caution: Refer to Fastener Caution in the Preface section.
Tighten the negative battery cable (2) nut and tighten to 16 N·m (12 lb ft).
Reprogram the radio presets. Refer to Radio Programming and Setup.
Re-initialize the power sliding doors. Refer to Rear Side Door Actuator Control Module Programming and Setup.
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 2196318
Radio Programming and Setup
Each of the following service procedures require programming or setup procedures to be performed on the radio.
Radio Programming and Setup
Note: The radio setup files will configure the radio amplifier (if equipped), internal equalization settings, and program the vehicle identification number (VIN). Without the following setup procedure, the sound quality and volume of the radio may be degraded.
For Navigation radios, setup is completed using the scan tool and the VIN relearn procedure.
If exchanging the same radio, from one vehicle to another, the VIN from the vehicle receiving the radio needs to be programmed with the scan tool.
For the base radio, use the VIN relearn procedure available in Module Setup menu of the scan tool. After programming cycle the ignition key with the retained accessory power (RAP) disabled.
© 2011 General Motors. All rights reserved.
Service Information
2009 Chevrolet Uplander | Montana SV6, Uplander VIN U/V/X Service Manual | Document ID: 1819403
Rear Side Door Actuator Control Module Programming and Setup
Power Sliding Door Modules
The unlatching, opening, and closing of the power sliding door (PSD) is controlled by the power sliding door module (PSDM). There is one module for each sliding door. In order to continuously monitor the position of its respective sliding door, each module interprets and stores information it receives from the position sensors mounted in the associated power sliding door motor/clutch assembly.
Power Sliding Door Module Replacement and Initialization Procedure
Replacement of the PSDM requires that the Power Sliding Door System be disabled by removing the PSD 15-amp fuse. Once the PSDM has been replaced and the fuse installed, the following initialization procedure must be performed for both sliding doors in the following order:
Manually close and latch the power sliding doors.
Perform two complete Open/Closed cycles for each sliding door using any one of the following devices:
• Appropriate switch mounted in the overhead console
• Appropriate switch mounted to the B pillar
• Remote Transmitter
• Special functions of the scan tool
With a scan tool, verify that the PSD Open/Closed Position Learned parameter displays "Yes".
Operate the power sliding door to verify completion of the procedure. Refer to Power Sliding Door (PSD) Description and Operation .
Power Sliding Door Module Reprogramming
Service parts are programmed during the manufacturing process and no additional programming should be necessary. However, in the event that a software change to the PSD is implemented after the start of production, the PSDM can be reprogrammed using the service programming procedure. Refer to Service Programming System (SPS) .
Power Sliding Door Module Re-Initialization: May Be Due To Related Component Service
If the power sliding door module has been removed and re-installed, or if battery positive voltage or ground has been removed from the module for any other reason, follow the power sliding door module replacement initialization procedure.
© 2011 General Motors. All rights reserved.
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