genestoy

I recently bought my grandson a 2007 Cobalt and had almost the exact same problems you are describing, took the car to a chev dealership and they said it needed a PSCM (power steering control module) to the tune of $875, so I said no thanks paid the diagnostic bill and went to another dealer and bought the steering column with the PCSM attached as that is the only way it comes, installed it myself and you guessed it the exact same problems. I then took the car to another larger dealer and after a few hours of diagnostics fixed the car with no parts required! It turned out to be a broken (internal break) high speed lan wire between the two main computers (not the PSCM)! The wires in these vehicles are real tiny and subject to easy breakage I was told by the tech. You just may have the same problem and you need a tech that knows what he is doing.
I submitted a claim to GM to re-coup the $355 the steering column cost due to the erroneous diagnostic by the first dealer and lo and behold I got a check back for the full amount!

Z'06

With the engine off, you can try disconnecting the negative and positive cables from your battery, and then holding the cable tips together for 15 seconds or so to reset the computer.

Jimbo B

Gene, thanks for your input on this. I know there are alot of other GM owners out there have these problems but can't get anyone from GM or any of the dealers i have been to, to admit that there is a problem. I am really sick of the run around. GM customer service is not any any help. I guess they are trained to just say "we are working on it and we want you to be satisfied". Other than that, there is no straight answers from them. How did you submit the claim to be reimbursed for the bad diagnostics? I am very interested about that. I have been getting a line of BS about being reimbursed by the dealer for repairs that have not fixed the problem.

Thank you for your time...

James

Jimbo B

Just another update here.... My Hoe is still at the dealership. To date they have replaced PCM, BCM, TCM and are now checking serial data lines for bad connections and or broken wires.... GM has still been no help. Customer service has stopped calling. Just as well though, they are USELESS. Still have not been able to get my money back from DOSSETT GMC in HATTIESBURG MS for bad diagnostics. They said the BCM would fix it.. NOT!!!!....... Guess I'm just gonna have to send it to auction and take a beating on it....

Jimbo B

Update.... again..... They have replaced the positive battery cable??? said the resistance was too high in it??? and replaced the terminating resistor in the hi speed data line. Picked it up today. I guess time will tell.

Jimbo B

Its been a few months and its still doing fine. I think they got it figured out.

in2pro

Good to hear, not to make light of your plight, but it seems lots of folks on this forum were pointing to battery connections early on, kinda odd that the service techs did not take this approach and instead chose to go for the high dollar electronic components first...

POS2007Tahoe

Did you ever find a solution to this? I'm having the same problem with my 2007 Tahoe. Door locks, guages, interior lights acting up, ABS, Traction Control, Stabilitrak, Brake Lights on, chimes going off. Took it too the dealer, they said it was the BCM...They replaced it ($600 repair). Drove it home at 5:00pm, same things starting to happen gain not even an hour later. When I went there, I told them "if you replace something and it doesn't fix the problem, I'm not going to pay for it" They just shook there head saying, "of course!" Uh huh. Well, before I take the truck back down there again tomorrow (another wasted day), I'm going to dispute the charge on my credit card. Also, whomever replaced the BCM, apparently took a knife and cut the bracket off of the AC ducting to get at the BCM under the dash and now this piece of ducting is just dangling under the dashboard. I have had it with this dealer. Every time I go to this dealer, whatever the issue, big or small, it's always at least 2 trips. One to fix what I went there for, and the second to take it back to fix the things they broke.

Jimbo B

Per engineering at Chevrolet, they replace the terminating resistor in the wiring harness (its near the spare tire) and they replace the battery cables ( said the resistance was too high) and i have had only one little hiccup since then(its been a year now) and it only lasted about 5 seconds. i think they finally got it right. I requested to see an area rep from Chevrolet and he is the one that got enginering involved. It was a painfull process over about 3 months to get it fixed. But in all I only paid out about 200 bucks. and they replaced 5 diffrent modules at 2 diffrent dealers.

Chevrolet Customer Service

<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:PunctuationKerning/> <w:ValidateAgainstSchemas/> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:Compatibility> <w:BreakWrappedTables/> <w:SnapToGridInCell/> <w:WrapTextWithPunct/> <w:UseAsianBreakRules/> <wontGrowAutofit/> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> </w:WordDocument> </xml><![endif]--><!--[if gte mso 9]><xml> <w:LatentStyles DefLockedState="false" LatentStyleCount="156"> </w:LatentStyles> </xml><![endif]--><!--[if gte mso 10]> <style> /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} </style> <![endif]--> I am sorry to hear of all your frustrations. I would like to investigate this issue further. Could you please pm me your name and VIN number? I look forward to hearing from you soon.

Louis
GM Customer Service