power steering pump
09-03-2007, 07:53 PM
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power steering pump
well i did a search and really couldn't find what i was looking for. i have an 07 sierra classic with 3500 miles on it and every once in awhile my PS pump starts to act up. i've taken it in once before to the dealer and of course it didn't do it when they had it. my problem is sometimes when the truck is sitting and at idle and i try to turn the wheel it feels like there is no PS. when it's doing this the PS pump is whining like when it's all the way to the left or to the right. i'm gona take it in again this week and hopefully it's still having the problem when i take it in. what would be causing this to happen, has anyone else had this problem? i have the stock 17" wheels and tires
09-04-2007, 08:51 AM
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Here you go friend. This should help you out. Print this off and go to your local dealer or a local repair shop that you trust.
EI06002 - 670 Gear Box Power Steering Pump, P/S Performance Concerns #05-02-32-008B - (07/18/2007)
Models: 2003-2006 Cadillac Escalade, Escalade ESV, Escalade EXT
2003-2006 Chevrolet Avalanche, Suburban, Tahoe
2003-2007 Chevrolet Silverado Classic
2007-2008 Chevrolet Silverado, Suburban (2500 Series Only)
2003-2006 GMC Yukon, Yukon Denali, Yukon XL
2003-2007 GMC Sierra Classic
2007-2008 GMC Sierra, Yukon XL (2500 Series Only)
--------------------------------------------------------------------------------
This bulletin is being revised to add model years and models. Please discard Corporate Bulletin Number 05-02-32-008A (Section 02 -- Steering).
--------------------------------------------------------------------------------
Condition
Some customers may comment on a lack of steering assist when stopped or during parking lot type maneuvers. A lack of steering assist could occur if the brakes are applied and turning the steering wheel with the vehicle stopped or during parking lot type maneuvers. This condition will go away or greatly improve once vehicle begins to move or is above parking lot speeds. This concern can be aggravated by worn tires, low tire air pressure, low power steering pump pressures, and tires larger than stock size.
Correction
Important: In all cases, it is recommended that the proper tire size and the maximum tire pressure is set according to the manufacturer’s specification as noted on the door placard; especially for the front tires.
Perform the "Power Steering System Test" found in SI. Make any necessary repairs based on system diagnosis.
1.1. FOR 2500 AND 3500 VEHICLES ONLY - If diagnostics did not lead to any repair, this concern is a normal operating characteristic. No further repairs should be made. A Field Product Report should be submitted - refer to Corporate Bulletin Number 02-00-89-002D.
1.2. FOR 1500 SERIES VEHICLES ONLY - If diagnostics did not lead to any repair, this concern is a normal operating characteristic.
If the vehicle is equipped with a 670 gear box, replacing it with a 680 gear box may increase the customer satisfaction.
To determine if the vehicle is equipped with a 670 gear box, inspect the mounting bolts that attach the stub shaft housing. A 670 gear box will only have 3 mounting bolts. If the stub shaft housing does not have any mounting bolts or has 4 bolts - DO NOT PROCEED WITH THIS BULLETIN. The vehicle is not equipped with a 670 gear box.
If replacing a 670 gear box with a 680 gear box, it will be necessary to replace the power steering gear, union fitting and both inlet O-ring seals.
Parts Information
Part Number
Description
88965542
Power Steering Gear
26025709
Union Fitting
26001594
Inlet O-ring Seal
EI06002 - 670 Gear Box Power Steering Pump, P/S Performance Concerns #05-02-32-008B - (07/18/2007)
Models: 2003-2006 Cadillac Escalade, Escalade ESV, Escalade EXT
2003-2006 Chevrolet Avalanche, Suburban, Tahoe
2003-2007 Chevrolet Silverado Classic
2007-2008 Chevrolet Silverado, Suburban (2500 Series Only)
2003-2006 GMC Yukon, Yukon Denali, Yukon XL
2003-2007 GMC Sierra Classic
2007-2008 GMC Sierra, Yukon XL (2500 Series Only)
--------------------------------------------------------------------------------
This bulletin is being revised to add model years and models. Please discard Corporate Bulletin Number 05-02-32-008A (Section 02 -- Steering).
--------------------------------------------------------------------------------
Condition
Some customers may comment on a lack of steering assist when stopped or during parking lot type maneuvers. A lack of steering assist could occur if the brakes are applied and turning the steering wheel with the vehicle stopped or during parking lot type maneuvers. This condition will go away or greatly improve once vehicle begins to move or is above parking lot speeds. This concern can be aggravated by worn tires, low tire air pressure, low power steering pump pressures, and tires larger than stock size.
Correction
Important: In all cases, it is recommended that the proper tire size and the maximum tire pressure is set according to the manufacturer’s specification as noted on the door placard; especially for the front tires.
Perform the "Power Steering System Test" found in SI. Make any necessary repairs based on system diagnosis.
1.1. FOR 2500 AND 3500 VEHICLES ONLY - If diagnostics did not lead to any repair, this concern is a normal operating characteristic. No further repairs should be made. A Field Product Report should be submitted - refer to Corporate Bulletin Number 02-00-89-002D.
1.2. FOR 1500 SERIES VEHICLES ONLY - If diagnostics did not lead to any repair, this concern is a normal operating characteristic.
If the vehicle is equipped with a 670 gear box, replacing it with a 680 gear box may increase the customer satisfaction.
To determine if the vehicle is equipped with a 670 gear box, inspect the mounting bolts that attach the stub shaft housing. A 670 gear box will only have 3 mounting bolts. If the stub shaft housing does not have any mounting bolts or has 4 bolts - DO NOT PROCEED WITH THIS BULLETIN. The vehicle is not equipped with a 670 gear box.
If replacing a 670 gear box with a 680 gear box, it will be necessary to replace the power steering gear, union fitting and both inlet O-ring seals.
Parts Information
Part Number
Description
88965542
Power Steering Gear
26025709
Union Fitting
26001594
Inlet O-ring Seal
09-05-2007, 08:55 AM
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Originally Posted by 04BlackGmc
mine does this alot... damn
09-05-2007, 07:06 PM
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Originally Posted by Torque_Wrench
Yeah man.....and you will probably feel it a bit more prominent than others because you got some bigger tires than most. It seems that the bigger the tire...it tends to have a little more lack of power assist.
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