I have a LTZ so I wonder if that is where they are different.

 

Paid 18.95 per blade from the dealer for OEM. Keep life simple.

 

No difference between trim levels, the difference is in model years. Chevy went to a different arm (with the j clip) after problems with the style you have - wiper blade didn't keep contact properly with the windo. There's a bulletin on this and Chevy will replace the arms. With the j clip arms you can buy any 22 inch aftermarket blades to fit. Here's the bulletin info:

Subject: Windshield Wiper Streak at Low Vehicle Speeds (Replace Windshield Wipers and Arms) #07-08-43-010 - (12/05/2007)



Models: 2007-2008 Cadillac Escalade, Escalade ESV, Escalade EXT

2007-2008 Chevrolet Avalanche, Suburban, Tahoe*

2007-2008 GMC Denali, Denali XL, Yukon, Yukon XL

*Excludes Tahoe Police Package




--------------------------------------------------------------------------------

Condition
Some customers may comment that the windshield wipers streak the windshield and do not clean properly at low vehicle speeds.

Cause
This condition may be caused by low blade pressure to the windshield.

Correction







Replace the wiper blades with conventional styled blades. The wiper arms will also have to be replaced.

Open the hood.
Remove the windshield wiper arm finish cap. Use a small flat-bladed tool to remove the finish cap.
Remove the wiper arm nut and disconnect the washer hose.
Remove the wiper arm using the J 39637 - Wiper Arm Puller.
Install the wiper to the wiper arm and remove the plastic union from the new assembly.
Install the wiper arm assembly to the vehicle. Line up and hold the blade to the vertical black bar target mark located at the lower center portion of the windshield and tighten the nut.
Tighten
Tighten the nut to 30 N·m (22 lb ft).

Install the windshield washer hose.
Install the finish cap.
Close the hood.
Parts Information
Part Number
Description
Qty

25879117
Wiper Arm-Left
1

25879116
Wiper Arm-Right
1

15214346
Wiper Blade
2


Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

B1784
Arm, Wiper-Windshield (One Or Both) - Replace
Use Published Labor Operation Time




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

 

That makes sense now. Everyone is telling me that any aftermarket blade will bolt right on. They must have had the bulletin performed already. I'll have to get that one done.

Thanks

 

Good info. Thanks. jeffbco