Question about 1990 GMC Sierra
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Posted on Jan 02, 2017
SOURCE: 1998 GMC SIErra
Check your transmission. Look underneath the truck and see if you see moisture around the transmission pan. If you see any indication of that, you may have a huge issue on your hands. Your reverse gear is seized to the Drive Gear. However hopefully it's something like needing a new clutch or a clutch adjustment
Posted on Aug 23, 2009
Climb under your pickup and look where the cable connects to the side of the transmission and make sure there is not any mud around the cable or around the shift linkage hookup. If so clean it off and see if it will shift. We have found many of these with mud caked around the shift linkage or a lot of ice buildup and wont allow it to shift into park.
Posted on Dec 11, 2009
It is an adjustment or clutch replacenment issue. Manual transmissions rarely have a lube issue unless you have seen a big puddle of very thick oil in the driveway.
I think I'd be looking at the clutch of this 16 year old vehicle. Unless you have the tools, time and skill to change the clutch, this is probably a job better left to a professional. Adjusting the clutch mechanism might help for a while but I think you will soon need a clutch job on your GMC.
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Posted on Jan 14, 2010
SOURCE: Brake lights won't come on
check for a bad brake light fuse! if not the fuse, the brake light switch operates brake lights and if bad you will not be able to shift it out of park, as well as the brake lights not coming on.! because you have to put foot on brake to do so. if bad switch, it wont let it out of park. it could be just out of adjustment also!! good-day !
Posted on Aug 28, 2011
The gear shift lever indicators tell you what gear you have an automatic transmission
in on your vehicle. The shift solenoid tells the transmission when to
shift gears and what gear to shift into. Newer model automatic
transmissions have electronic shift solenoids that are activated and
change gears based on the speed the vehicle is traveling.
Troubleshooting either one of these transmission components is
relatively easy if you know a little about automobile mechanics. With
the right tools, you can determine whether the transmission shift
solenoid is having a problem. Gear shift indicator problems can be
determined simply by moving the gears into their designated position.
Transmission Shift Solenoid
Gear Shift Indicator
Posted on Feb 02, 2012
Testimonial: "Thank you brian for youre help with my transmission problem smooth ride now ."
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