Why does my Sierra truck not shift gears?

Why does my Sierra truck not shift gears?

2003 Sierra-My truck is doing the same thing- speedo reads zero and won’t shift out of first. I cleaned the MAS, replaced shift sensor, made sure trans fluid was full, disconnected and reconnected the battery, and now I am thinking of replacing the stepper motors for the speedo but don’t think that covers the shifting issue.

What happens when you put a GMC Sierra 1500 in drive?

I then changed the speed pickup on the transfer case, which did not help the speedometer. Now the truck will shift 1-2 manually, but when you put it in drive, it free wheels: nothing at all; no drag or anything. The computer just checks code 12. If you put it in drive, it stays in low.

Why does my speedometer not work on my GMC Sierra 1500?

– CarGurus Speedometer doesn’t work and transmission doesn’t shift gears. The speedometer stays at 0 all the time. When the transmission is in drive it won’t come out of 1st gear. Reverse works fine, and if I manually put the transmission in 1st or 2nd it works fine.

Where is the speed sensor on a GMC Sierra?

112 people found this helpful. I replaced the vehicle speed sensor VSS then unplugged the vehicle speed sensor buffer VSSB (a 3 inch square flat white plastic sensor box) located behind the glove box, I unplugged it and waited 5 minutes before plugging it back in.

When did my Chevy Suburban start stalling out?

We purchased it from a Chevy dealership back in 2002. It was a GM buy-back, for the same reasons it’s now having. NO DTC’s, NO CEL. Having a problem with stalling. It usually happens after backing out of parking areas when vehical returns to idle while shifting from reverse to drive.

Why does my 2002 Chev suburban vibrate when idle?

My 2002 Chev Suburban has a slight tremor or vibration when it is idle or at a red light. I have replaced the plugs, and added gas treatment, but it still vibrates. It noticed it right after a fillup with 87 octane gas, and wonder if it is a gasoline issue.It has 52k miles on it, and otherwise runs great.

What kind of engine does a Chevy Suburban have?

My 1999 454 7.4 liter suburban LT turns over several times when cold before spluttering into life ( it then nees a bit of gas) and Idles roughly. i think it may have a slight missfire. is this a common problem.

Can a bad crankshaft sensor cause engine to run rough?

You will feel, and maybe hear, this as a brief stutter in the engine. You might feel that the engine runs rough or vibrates at idle, say, when you’re sitting at a red light. This is similar to the above in that it stems from poor spark timing. As seen with rough idling, sometimes crankshaft position sensor problems are worse at low engine speeds.