1999 GMC Sierra transmission problems

Filed Jan 31, 2014 · Brakes, Engine · 150,145 miles · NY

Brake fluid leaking all over bottom of truck spraying out I took to a mechanic and had 1000 dollar brake line job done got truck back and ABS brakes worked like manual brakes had a sensor and 2 ball joints replaced im being ripped of from a gmc loyal customer I was I guess back to ford or toyota for my next new trucks I had warranty issues you cheap [xxx] wouldnt pay for a waterpump that was leaking only a 7 dollar gasket also had a transmission on my work van repair and then replaced after a month of run around. Information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6).

Filed Sep 25, 2011 · Transmission · 79,000 miles · ID

Np8 actuator motor failure.

Filed Sep 6, 2005 · Transmission · 60,000 miles · OH

Dt: 1999 gmc sierra 1500. While driving the truck for about 45 minutes to an hour and if stopping at a stop sign or red light the truck will not shift from first gear to second gear properly. Once the truck does shift it is a very hard shift, and if on wet or slippery surfaces the truck will squall the tire. This started around 60, 000 miles. This does not happen every time, it is hit or miss. While pulling across three lanes of traffic the truck shifted properly and was almost hit by on coming cars. Took vehicle to the dealership, and they said it was the transmission. It was a common problem with gmc trucks. There is a kit that is made to fix this problem, but transmission must be replaced and the repair cost is between $700 - $1,800. This happens 4 to 5 times a week. *ak

Filed Aug 31, 2005 · Fuel system, Transmission · 95,000 miles · MI

Gas tank gauge works once in a while. Our mechanic said it was probably due to moisture. Also, the rear differential cover is either cracking or rusting through. I put a new gasket on it and the next day it was leaking again but not at the gasket. About 1/3 up from the bottom, you can see where fluid is leaking through the cover. I called 2 dealers (1 chevrolet, 1 gmc). They both gave me numbers to other dealers (1 in pa., 1 in ia., 1 in upper mi.). The two out of state dealers told me that the part was for a customer and would not sell it. The one in mi. Also said that, in addition to "that must be a popular part, because I've had every dealer in the country call me." is this part a defective piece?

Filed Jul 5, 2005 · Transmission · 49,000 miles · WI

While attempting a three point turn across a road the automatic transmission began grinding after putting the vechile in reverse. I was in the lane facing oncoming traffic when this occurred. The reverse gear no longer functioned. Fortunetly there was no oncoming traffic and I was able to put the vechile in drive and straighten it out, getting back to the parking lane. The vecile only has 49,000 miles. In the research I have done on the problem so far I have discovered that the automatic transmission failing is a common problem. For example, a man named chuck who works at all-world transmission (262‑547‑0136) says these vechiles come in all the time with the same trasnmission problem. Gmc claims it is a not a safety issue and will not issue a recall. I beg to differ. I had my wife and 5 month old daughter in the truck. If there had been a car coming, I might have been in trouble.

Filed May 31, 2005 · Transmission · 40,000 miles · MI

Transmission hesitates badly to shift 2-3, when cold out

Filed May 3, 2005 · Body, Brakes · 72,000 miles · NY

I complained to gmc directly about ABS failure and reported it to atty. Gen of nys.I was told its normal wear in states with salt, funny that the paint is good to this day

Filed Jan 15, 2004 · Transmission · 83,303 miles · IA

Today while trying to park my truck, I pulled into a parking spot and was going to back up, when I heard a whirring noise. I put the truck back in neutral,noise was gone, back in reverse noise has returned. No reverse. I abandoned parking and drove home. I had all forward gears. When I returned home, I put the truck in park..... No park the truck rolled ahead and almost hit another vehicle. Called gmc, was told to take to dealer. Service manager said the problem was the reaction sun gear and shell internal in transmission. Very common problem. This is more than just a failed transmission, its a safety issue with no park in transmission. Gmc basically told me I am s.o.l., and would not acknowledge the problem with no park and that safety issue.

Filed Aug 20, 2002 · Acceleration, Brakes · NY

Gmc sierra has been in shop to many times to keep track of. Truck also has a problem with sticky throttle body which has been dangerous.gmc gave extended warranty in 2000 bacause of problems also issued customer appreciation certificate if I wanted to buy new gm product.service manager told me to cut my losses and but a new one.gmc will not do a thing for me. Contacted nys attn. General about problems.gmc now has their legal core calling me at home . I have asked them to buy vehicle back research the parts and assembly to protect other owners. Gmc says sorry . I asked them how they could warranty rust thru for 100,000 but could not protect ABS from corrosion, gmc response was hey you live in new york state. And they are under no financial obligation what so ever

Filed Jul 29, 2002 · Electrical, Transmission · MI

Truck jammed on brakes and shifted into reverse with no warning due to the ECM (brain) malfunctioning. Please describe details.