Noises During Shifting Problems of GMC Jimmy

The 4l60e transmission seems to be running hot during warmer summer weather & while driving up hills towing a trailer. The transmission also seems to be shifting rough during warmer summer months too. There is a shudder every once in a while during low speed turning. Now there is a noise consistent with a speed around 55 mph.

See all problems of the 1999 GMC Jimmy 🔎.

Vehicle has non-engaging transmission as at times it will not shift though it is an automatic and sometimes it starts out in 2nd and then drops down to 1st. Service engine soon light illuminated on 3 occasions as there were emissions problems. Front end makes constant popping noise. Problem has been lubed on 3 or more occasions as well as coil springs have been replaced and lubed. Brakes went completely out while trying to stop at an intersection. There was a rupture in the brake booster.

See all problems of the 2001 GMC Jimmy 🔎.

Ignition switch failed three times, causing vehicle to automatically shut off. Consumer states that engine soon light illuminates, driver?s window motor failed and window will not go up or down, all dash lights and gauges will stop working, muffler has hole in it and makes loud noise, muffler and pipe exhaust system replaced, and when crank sometimes backfires and shifts hard, servo making bang shift, installed servo and 2 synolids.

See all problems of the 1998 GMC Jimmy 🔎.

Transmission makes loud roaring noise usually when starting from a stop (5-10 mph) and won't shift into next gear - have to decelerate and try again and sometimes takes 3-5 attempts before will shift - had to pull to side of road on several occasions during rush hour. Almost in accident on one occasion due to this problem. Occasionally transmission has roared when traveling 50 mph and had to decelerate. No transmission light warning me of problem illuminates. Had serviced twice and still same problem and dealership fixed oil leak on first service (vehicle had to be towed to dealership) and replaced part 2nd service and still is a problem, last occuring on 7/15/99, following 2nd service. I am going to request a 3rd service. Dealership has not had a transmission service/repair man on staff the last 3 attempts to get repair. Both services have been completed by adams Chevrolet/GMC in raytown, mo because dave cross has not had a transmission man. However, for the 2nd service (July 1999), dave cross accepted the Jimmy for service but had adams do the service. Dave cross service mgr (I believe is mgr) told me when I picked up Jimmy following 2nd repair that there had been a recent "bulletin" that required a piece be replaced which they did and supposedly fixed the problem. However, the problem still exists, so I will have to take the Jimmy in again. Also, I requested to see the bulletin and the mgr refused. He said it was not for customer use.

The transmission intermittently slips into, but not fully, 4wd when the vehicle is put in reverse. There is a very noticable noise that sounds like the transmission is not fully engaged. The only way to eliminate the noise is to shift the vehicle into 4wd and then back into 2wd. The vehicle has been brought back to the dealer on at least 4 occasions with this complaint. They have not been able to duplicate the problem and therefore have not done any research. On December 19th, 2000 the symptom reappeared after backing my car out of the driveway and I immediately brought it to the dealer. The service manager then test drove the vehicle and noted that the problem I described previously does exist and scheduled me to bring in the truck on Thursday, December 28, 2000. When I brought the vehicle in the manager who had test drove the vehicle just one week ago did not seem to recall the condition and said they would check it out. I have a problem with the way the whole thing is being handled. I can't believe that my vehicle is the only one that has this problem in the entire country. I would think that GMC should have some information regarding this in their database. At this point I am not convinced that the proper diagnostic methods are being taken to locate the problem and remedy it. I don't know where else to turn and I am looking to you for any guidance that you can provide.

See all problems of the 1997 GMC Jimmy 🔎.