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GMC Sierra: Problems & Solutions ![]()

1492 messages, Last post on Oct 12, 2006 at 5:32 AM
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| you may want to order a Lund Interceptor for it, hopefully Lund has one by then.... | |
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Vehicle: 1999 GMC Sierra 1500, 4wd, ext cab, 5.3 l, 4.10 diffs(rear locking). Description: When transmission is cold (below 25 degrees)the 2-3 upshift does not occur until 32-33 mph. As the transmission warms, shifting becomes normal. Under light acceleration, approximate normal shift is: 1st-2nd: 10 mph; 2nd-3rd: 20 mph; OD: 35 mph. 33 mph in 2nd gear is 2500+/- rpm, way to fast for a cold engine (or transmission). This has been a problem since the first winter (99). Not a problem in warm weather but the cold has returned & it's the same as last winter. Transmission was serviced in Sept (flushed) w/approx 32K miles. My brother inlaw has a similar setup (4wd/5.3/3.73/sb)& has the same problem. His dealer said this was 'normal'. Any advice on this problem? |
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I have roughly the same vehicle that you do, except mine's a 2000 Z71. The owners manual(2-23) says that when the temperature gets below 32 degrees, the transmission is designed to shift differently until the engine reaches normal operating temperature. Something about improving heater to performance. M. |
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This behavior is by design, it is not a problem even though it may be annoying. |
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This must be another 'better idea'. Oh, well. Other than that (and the other standard issues this series has had), this is one great truck: rides great, good fuel mileage, tows anything, goes anywhere. Thanks for the response! |
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| Toyotas "hold" the shift until warmed up too. | |
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I've got a 99 Sierra with a couple of annoying problems the dealership has totally ignored. Has anyone had: 1) A creaking or growning sound in the front end when making sharp turns?? This problem didn't start until I hit bout 20k. Everytime I back out of the drivewy, the front end lets loose a "somethings binding" type groan. The classic dealership diagnosis was "dirty PS fluid". 2) Erratic Fuel Level Mesurement?? Once again, not something that started until several thousand miles were logged. I can put gas in and get one reading. When I get home, it can be reading an 1/8th of tank different. Depending on gas sloshing in the tank, I've seen the gage needle travel a 1/4 tank back and forth. A low fuel gas slosh has occasionally set the "Low Fuel" light blinking off and on. The dealer response: The tech sat in 2 new Sierra's and noticed different gas level readings each time he started them, so there is no problem. End of diagnosis.
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| I've been reading all the Sierra info. and wondered if anyone has any firsthand experience with the new Sierra c-3? The 6.0 sounds great but would like to know if the all wheel drive feature is as good as it looks on paper. Any comments? | |
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I have a 1997 GMC Sierra purchased New in 97. It is a Regular Cab, Short bed. V6, automatic. It was bought because I wanted something safe. This thing has had what I think are alot of problems in it's 3 year, 29,000 mile life. Here are some of the things replaced, most went bad before 20,000 miles:
Power Steering Pump
I took the truck thru arbitration, the arbitrator sided with GM, deciding it did not have "4 repairs on the same item"). The most irratating is a noise in the front end that started after I had the wheel bearings re-packed. A click noise everytime it goes in a driveway, or over a bump. Not as bad since the cold weather hit, but annoying just the same. It also has a problem with the rear brakes staying "adjusted" (I had the brakes checked last week, it still has over 60 percent of the front linnings left, and over 90 percent in the rear). Fuel Milage in town is about 13 in the summer, 18 on the highway (60 to 65 mph). In cooler weather it's about 15 city, 20 to 23 highway). I do not lead-foot it, and have "baby'd" it since new, which is why I worry about how it would preform if used normally. Am I expecting too much from a new vechile? My old 74 Pinto did not have half the problems of this truck (for that matter I don't recall having any vehicle with this many problems, except for a 78 Subru Brat with an un-fixable 4 speed).
Any info would be welcomed. You can e-mail direct at dkacy |
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to the 74 pinto? Sounds like you just got a bad one.......results are not typical of that vehicle.... - Tim
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