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Pickups Chevrolet Silverado & GMC Sierra GMC Sierra: Problems & Solutions 
1492 messages, Last post on Oct 12, 2006 at 5:32 AM
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| The dealer will not fix any TSB without charging for a vehicle out of warranty. A manufacturer's recall is another story. | |
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I have two current issues with my '99 Sierra 1500. The digital odometer sometimes does not come on when I start the truck. Typically, if I hit the trip reset button it will come on, or over time it will return. Also, there is a grinding noise coming from the front passenger side of the truck. At low speeds (parking lots, city corners, etc.) I hear a sound like something rolling around in my glove box or something grinding. The dealership didn't know what to tell me but "didn't think it was anything serious" because they couldn't get it to happen all the time. Any help on either of these issues would be much appreciated. |
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| where is the cabin filter located? how do you change it on a 2002 sierra 2500hd? | |
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Replying to: obriendm (Mar 19, 2004 9:12 am) One thing I don't like about the head-bolt torquing procedure is the instruction to torque each bolt to 22 ft-lbs and then to turn each short bold an additional 55 degrees, each medium bolt 65 degrees, and each long bolt 75 degrees. Seems to me you could get a lot of variation at only 22 ft-lbs for the initial tightening on bolts of that diameter, and to go from there using degrees could result in inconsistent final torque values. I'm wondering if the leakage, which occurred in short-bold areas, was due to this torquing procedure, assuming it used in the factory. |
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The truck is a 1994 GMC Sierra 1500 truck w/approx 170K miles on it. I would appreciate any feedback on my problem... I have had emissions problems for a few years now as can be seen in the following emissions transcript... Emissions Inspection 6/4/2002 Hydrocarbons (HC) – Inspection 5.3095 – Requirement 2.7000 FAIL Carbon Monoxide (CO) – Inspection 35.3126 – Requirement 60.0000 PASS Oxides of Nitrogen (Nox) – Inspection 0.4853 – Requirement 5.7000 PASS Carbon Dioxide (CO2) – Inspection 476.3944 Work Performed 8/2002 - Adjusted Timing to 0 TDC - Replace Oxygen Sensor  Catalytic Converter - Replace Spark Plugs - Replace Ignition Wires - Replace Distributor Cap & Rotor - Replace PCV Valve - Replace Air Filter Emissions Inspection 8/2002 Hydrocarbons (HC) – Inspection 0.1880 – Requirement 2.2000 PASS Carbon Monoxide (CO) – Inspection 1.9014 – Requirement 60.0000 PASS Oxides of Nitrogen (Nox) – Inspection 0.0070 – Requirement 4.2000 PASS Carbon Dioxide (CO2) – Inspection 73.1697 Emissions Inspection 7/13/2004 Hydrocarbons (HC) – Inspection 6.7361 – Requirement 2.0000 FAIL Carbon Monoxide (CO) – Inspection 62.4512 – Requirement 60.0000 FAIL Oxides of Nitrogen (Nox) – Inspection 0.3481 – Requirement 4.0000 PASS Carbon Dioxide (CO2) – Inspection 599.9200 Work Performed 11/2004 - Adjusted Timing to 0 TDC - Replace Spark Plugs - Replace Ignition Wires - Check and Clean Distributor Cap & Rotor - Replace Air Filter Emissions Inspection 7/13/2004 Hydrocarbons (HC) – Inspection 4.6401 – Requirement 2.0000 FAIL Carbon Monoxide (CO) – Inspection 18.6279 – Requirement 60.0000 PASS Oxides of Nitrogen (Nox) – Inspection 0.2441 – Requirement 4.0000 PASS Carbon Dioxide (CO2) – Inspection 609.0446 Work Performed 11/2004 · Check and clean EGR valve. Valve seemed to be fine, but cleaned. - Two cans of GMC Top Engine Cleaner have been sprayed into carb and left to sit overnight for cleaning on two different occasions. Still notice low throttle, low RPM miss (seems to get worse as engine temperature increases). There is a slight hesitation upon acceleration from stop. I have no noticeable problems at higher RPMs. After engine warm-up and when truck is parked, holding the accelerator slightly so that engine revs around 700 – 900 RPM (a guess), the engine will stall, revs will decrease, engine will recover and surge back to 700 –900 RPM, stall, and repeat in a cyclical manner. I'm hoping that someone can give me an idea as to what could be the cause of my problems...I have less than two weeks before my emissions re-inspection. I'll gladly reply if further info for diagnosis is required...Thanks |
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I Have a 2004 GMC Sierra 1500 shortbed with a 4.3L engine and about 15 miles on the truck. I drive 35 miles one way to work, mostly interstate. I am only getting a little better than 16 miles per gallon on the highway. I took it to the dealer for a chek-up, but was told thiat it was ok. Anyone have any suggestions on improving the gas mileage?
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Replying to: serra04 (Oct 25, 2004 6:12 pm) sososierra |
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Replying to: ricampbell5050 (Apr 17, 2005 2:24 pm) |
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| I don't remember it, but there is a formula for determining rpm based on gearing. Try a 4WD or hot rod magazine. They're always chaging tires and gears, might be an easy place to start. I don't think it'll make that big of a difference. Gaining 1-2mpg for the cost of swapping gears might take awhile to recover costs. I swapped in a lower thermostat in my Safari because my company van ran at 165 and out of the box my van ran at 195. I went through all the trouble and while it ran at 165, it didn't do anything to help the van that I saw. Just some food for thought. | |
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Replying to: neecer (Mar 25, 2004 11:12 am) Steve |
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