20 Most Recent 2007 GMC Sierra 3500HD Questions & Answers

My info says, for 10.5--11.5--12.5 ring gear tighten nut 52 ft lbs, loosen nut, then finger tight, If you need to loosen just a bit to line up key-way, that's fine. I don't know the socket size, good luck. It's always best to verify specs. I can only post what my database showed?

CK POWER A THE BRAKE LIGHT SWITCH

sometimes there is no light, or they use a common light such as a ****** error light while the glow plugs go out.

Give some more details of the problem.

when you push on the horn button do you hear a click.if so this is the horn relay working which tells you that the button,fuse,relay and wiring is good.there is a fuse panel under the dash on the drivers side.it may be that the horn needs replacing even thought the truck isn`t very old.

Allways been bad U-Joints, or a bent drive shaft that has caused the drive shaft to vibrate between such speeds.

Does it shake when accelerating hard up to 50mph? If you aren't getting any shaking in the steering wheel, and it feels like it is coming from the front, then it sounds like bad axles (mainly bad inner CV joints).

Try rotating the tires back to how they were before the shaking started, and see if it changes (not likely if there's no shaking in the steering wheel). Check this fault in two sample video:

Sample 1


Sample 2


Another thing, check all the suspension bolts you undid to change the coilovers. Make sure everything is tight. Did you neutralize all your suspension bushings before tightening the bolts? If not you could be getting bushing bind. To neutralize suspension bushings: loosen the suspension bolts, load the suspension (either the car sitting on the ground or the jack stands holding the car up by the suspension not the lift points), tighten the suspension bolts.

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Check for carrier bearing problem

How long was the vehicle without power? If a long time it could be an anti-theft problem if your vehicle is so equipped.

There is a relay for it. Pin# 30 is power and pin # 87 goes to the horn, and pin #85 is power and pin #86 comes from the steering column.