Tahoe & SuburbanThe power, space, and brutal towing ability make the Tahoe and its longer sibling, the Suburban, arguably the best full size SUV's on the market today.
Platform: GMT 400, 800, 900
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My 04 has begun to have steering problems.... while driving at normal speeds everything seems to work fine. When I come to a stop, or slow down to pull in the driveway or parking space it is if I've lost all power steering. While sitiing idling, I can turn the wheel to the left just fine, turning to the right does not work....
again all power is lost mainly turning left at low speeds or idle.
3. gear box?
Thanks, btw, newbie here....
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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Some customers may comment on a lack of steering assist when stopped or during parking lot type maneuvers.
Please follow normal diagnostics in SI for this condition. If the vehicle passes the Power Steering Pressure Test Procedure in SI this may be a normal condition. 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 concern can be aggravated by worn tires, low tire air pressure, low power steering pump pressures, and tires larger than stock size. In some cases, where the power steering pump pressures are at the low end of the specification, replacing the power steering flow control valve with P/N 26095470 may improve the concern. On 1500 models with the 670 gear please following Bulletin 05-02-32-008A, which may increase customer satisfaction.
No further repairs should be attempted as this is a characteristic of the vehicle. Any customer concerns should be referred to the Area Vehicle Manager (AVM) and a Field Product Report should be submitted by following bulletin 02-00-89-002D. When submitting the Field Product Report please advise if the vehicle is equipped with anything other than the stock wheel and tire size, example GM SPO 20 inch Wheels and Tires.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
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.
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what is odd is that just idling, without my foot on the brake, there is no power assist while turning right. So a portion of the TSB that basically says "hard steering" is normal while brakes are applied while steering does not apply here.
How is the power steering pressure checked?
I don't know the exact function of the steering flow control valve, but is it possible that it is only working one way causing the right turn issue?
Thanks again.... I'll give the control valve a shot. I work on most of my own stuff but the 04 is way different in many ways compared to my previous 95 Tahoe.... or my current 94 ext cab Z-71. Since I drive em for a couple of hundred k miles, I just purchased GM shop repair manual from Helm.... But if anybody can share the R&R of the control valve, it would be greatly appreciated.
ok guys I know this thread is old but I'm having same issues. I replaced the steering position sensor and steering is still bad, though not as hard. two people have told me to replace the power steering hoses as the ones chevy makes are junk. they swell up with fluid and collapse the center. or that there is a plastic insert that could come off and plug the hose. sounds good I am going to try today.