Question about 1998 GMC Sierra

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Well when i engage 4hi theres a thumping noise from below,sometimes in 2wd theres one hell of a rattling noise.also my steering is iffy power steering comes and goes but fluid is good.thanks yall

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Sounds like a bad Axle or u-joint, power steering going in and out would be the pump going bad

Posted on Apr 07, 2011

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Related Questions:

1 Answer

4 high won't engage but 4 lo and 2wd work fine


Check for power to the front differential actuator. This actuator slides a gear in position to lock the differential to drive the front wheels. If you have power and ground to the actuator when in the 4HI position, the actuator has gone bad.The 4LO is only engaging at the transfer case, but the front wheels are still not engaged if it is not working in 4HI.

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fullyjr.

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