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1990 GMC Suburban - Page 8 Questions & Answers
Vibration between 55 and 65 mph
I am a minor shade tree mechanic here so this is just a guess. It might be a front brake rotor, a break pad caliper that has a sticky hydraulic piston, front wheel bearing, or something else. Look at the pad and rotor wear for it possibly being a break system issue. Not sure, if you do not have a solid front axle look at the inner part of the wheel under the vehicle where the ball mates into the socket for any wet fluids or unusual gunk or build up around the axle and break calipers for a wheel bearing problem. Jack up the front end and make sure you chalk the rear tires, vehicle is in PARK and the steering wheel is unlocked as to where the steering wheel can be turned if needed. After vehicles front tires are off the ground try to pivot the front wheels to point in a different direction left turn or right turn. This can be tried by physically grabbing the tire trying to move the tire to point left or right. If the front tires are able to be pointed in a different direction without the aid of the steering wheel, then it could be a wheel bearing issue or a more serious issue. Hope you can make sense of these instructions, and hope this helps you find and fix any and all existing problems you are having with your vehicle.
Replaced brake switch,new brake-light bulbs,
Hi, assuming you have the correct bulbs installed, the wires leaving the turn signal switch seem to be broken along their trip to the back of the truck. If you tell me your model and year, I may be able to tell you where to look for the problem.
Diagnostic code 1404
best bet is to replace it for the long run. if code still comes on we have had a few chevy cars that needed a pcm updated this can only be done by the dealer most of the time it cost only one hour of labor. and it fixed it plus a few other things also good luck.
Milky engine oil
you have water in your oil. the source can be from varios location . I need more Info
1999 suburban timing problems
make sure the marks are on point if not correct it and turn it over twice and see if there still lined up might be a little off if so correct it and turn twice over again and check should be on after that
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