What's that noise

[shoboat90]

Can someone tell me what that noise is that comes from the driver side rear wheel in my 02' Denali everytime I start the truck?? It sounds like a pump or something, it seems to go for about 6-8 seconds.

thanks

[stizzout]

It's a good chance that it is your Auto-ride suspension pkg. I don't know for sure that the Denali had this option, but I've seen it on a late-model Tahoe.

If not that, probably some sort of fuel pump.

[tonytone]

Either the ABS system doing its system self-check, or the rear load-leveling system (air compressor) doing its thing. Mine makes a similar noise shortly after startup (it's an '04 though--dunno if that makes a difference since GM added/removed/changed some features on the NBS SUVs starting in '03).

[00'GMCYukon]

it sounds like there may be a problem with the load leveling compressor and also it could be the autoride. all denalis come standerd with this just to get that out of the way

[2kflhr]

Might be the fuel pump.