i have a 2002 chevy 2500 with the duramax. when i have my foot on the brake and try to steer it feels like i have no power steering.the wheel is so hard to turn. the dealer just put in a brank new power steering pump and it is still in the same condition. it isnt any better. also my brakes feel very soft. please help i have no idea what to do and i really need my truck fixed. gm says it is a normal condition and they cant do anything for it. please help

There has been a recall for the hydro boost switch, I am not sure if this would have been replaced with the new pump. Both the PS and PB's work off of the PS pump. You know what normal is for YOU, not what GM is telling you. It could be the dealer is jocking you around. I am sure someone who is more familiar with this topic could share more light on the subject. I would highly recommend finding a new dealer. If you mention where you are at, someone may be able to point you towards some help.

Ask the dealer to either fix the problem or to PUT IN WRITING that everything is normal and working properly so that you'll have it well documented when there is an accident your dealer certified that your brakes and steering were just fine. Write this down and give your request to the dealer and let them know that you are also sending a copy to GM.

Find a new dealer. There are situations where your steering wheel will be hard to turn when your foot is on the brake but it should be short lived and very temporary. If it does it every time your foot is on the brake then you defiantely have problems.

Lack of Steering Assist or Shudder During Parking Lot Type Maneuvers - keywords bind booster brake hard hydraulic low no noise oil power slow speed steer trailer #PIT3386A - (Apr 28, 2005)

Lack of Steering Assist or Shudder During Parking Lot Type Maneuvers 2002-2005 Cadillac Escalade, Escalade ESV, Escalade EXT
2002-2005 Chevrolet Avalanche
1999-2005 Express, Silverado, Suburban, Tahoe
1999-2005 GMC Sierra, Savana, Yukon, Yukon Denali, Yukon XL
2003-2005 Hummer H2
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in the PI.
Condition/Concern:

Some customers may comment on a lack of steering assist or shudder during parking lot type maneuvers.
Recommendation/Instructions:

Please follow normal diagnostics in eSI for this condition. If the customer situation warrants a repair, replace the current pressure control valve with P/N 26095470, available from GMSPO. This valve will provide additional steering assist during parking lot type maneuvers. If this concern occurs when stopped or at very slow speeds with brakes applied, please reference PIT3310.
Please follow this diagnosis 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.

99 - 05 Chrevolet/GMC/Cadillac/Hummer H2 all Full Size Trucks Utilities and Vans Lack of Steering Assist when Stopped or During Parking Lot Type Maneuvers - kw brake power oil hard noise booster low #PIT3310 - (Dec 9, 2004)

99 - 05 Chevrolet/GMC/Cadillac/Hummer H2 All Full Size Trucks Utilities and Vans Lack Of Steering Assist When Stopped or During Parking Lot Type Maneuvers .
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The following diagnosis might be helpful if the vehicle exhibits the symptom described in the PI.
Condition/Concern:

Some customers may comment on a lack of steering assist when stopped or during parking lot type maneuvers.
Recommendation/Instructions:

Please follow normal diagnostics in SI2000 for this condition. If vehicle passes the Power Steering Pressure Test Procedure this may be a normal condition. A lack of steering assist could occur if the brakes are applied and turning the steer wheel with the vehicle stopped or during parking lot type maneuvers . No 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 02-00-89-002C.
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Please follow this diagnosis process throughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed. If these steps do not resolve the condition, please contact GM TAC for further diagnostic assistance.
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Models:

(99-05 Chevrolet All Full Size Trucks, Utilities and Vans) and (99-05 GMC All Full Size Trucks, Utilities and Vans) and (02-05 Cadillac All Full Utilities) and (03-05 Hummer H2)

GMCSID, so does that last TB mean i am just sh!!t out of luck?

I just encountered this same problem for the first time this weekend. I have an '02 Durmax 35K miles. 70% pulling either a trailer or boat. Never had an issue until this weekend backing trailer into a camp spot. Had foot on the brake and steering wheel hard over. Steering wheel and brake shuddered and some noise under the hood, then felt like manual steering. Have not taken in to the dealer yet (figure they will do nothing, charge me, then give the run around). My buddy also mentioned the Hydro boost sw? What are the symptoms if this were to fail?

my symptoms where no power steering and a muchy brake pedal.

now if the dealer or gm says this is normal would it be worth it to contact the nhtsa since this is a safty problem? does anyone think they could do something?

If it's the pump, the brakes will be hard, not mushy.

well the truck is in the dealer now and the dealer said they are calling the GM engineers to look at the truck??? so it will be in the shop for a long time it looks like. i cant belive this is such a hard problem.

Is this a once in a while problem at idle or an all the time problem? Mine does it once in a while but I consider that normal for a hydro boost system. It's always at idle and its always with my foot on the brake and turning the wheel. Air on etc.

yes it is always not once in a while