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Prev Professional Automotive Repair Technical Discussions for April 20, 2011
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2003 Cadillac CTS 3.2L Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G6DM57N23
Vehicle came in with codes clear and pending codes p0154 insufficient activity bank 2 sensor 1. Did standard test for oxygen sensors using fuel enrichment and scope. Found oxygen sensor bad, recommended replacement of both front o2's. Vehicle left and came bac...
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1986 Chevrolet El Camino Conquista 5.0L Excessive Emissions, Poor Idle Quality, Hesitation VIN: 3GCCW8DH7G
Hello everybody, and thanks in advance for responding. I have this 86 El Camino that will run fine for awhile then go to running rich, out of time and will hardly idle. I am leaning to the Prom in the ECM as the culprit, but wanted some info before I did. What...
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1994 Chevrolet C1500 Suburban 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GNFK16K1R
Thank you for your help on this one, it is driving me crazy. After tune up,(Jan 10, 2011) this truck ran great but within a week or so it started to act up when started cold. Then it would not run well at all when cold but ok when warm. Yesterday the customer ... Trouble codes: 33 (Map sensor circuit high), 45 (Rich exhaust)
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1999 Chevrolet Corvette 5.7L Data Link Connector VIN: 1G1YY32G7X
My fellow Iatn Buddies I have a real good one for you guys today. This vehicle came in a couple of weeks ago with it sucking water through the air intake and it froze up the motor. We installed a brand new factory motor. Vehicle starts runs good, but had a ch...
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2001 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GBEL19W41
Customer came back with the vehicle cutting out intermittantly at 60+MPH after at least 15 miles of driving. They did tell me that it did this proir to the fuel pump replacemant. I took the vehicle on a drive to recreate customers complaint. The vehicle cut ou... Trouble codes: P0300 (Misfire detected)
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2001 Chevrolet Silverado 3500 8.1L No Start VIN: 1GCJK39G11
Hello, I'm looking for a little advice/tips on replacing the crankshaft sensor on this 8.1L. I have soaked it for 4 days with Kroil and still can not get it out. The top of the sensor is breaking. So I stopped before I break it off all the way. If I do break...
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2004 Chevrolet Avalanche 1500 5.3L 4 Wheel Abs VIN: 3GNEK12T54
I,m trying to help a fellow shop owner. This is his brother truck and once in a while the brake pedal goes to the floor. No codes no lights. Thinking it's the HCU but I'm a Ford Tech. and would hope someone with more experience can shed some light to confirm t...
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2005 Chevrolet Silverado 3500 6.6L #7 cylinder
Hi All- I have a 05 duramax LLY. Has bad midrange fuel knock on cyl #7 dosen't matter hot or cold. will fog out the shop and following cars in seconds. Have a Solus Scanner 11.2 update. Shut down #7 knock and smoke gone- so I replaced injector #7. Not much bet...
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2006 Chevrolet Malibu LS 2.2L Cooling Systems VIN: 1G1ZT51F66
This car came in with coolant in the oil. Pressure tested & nothing leaked externally but did loose presssure. Tested with exhaust analyzer & found HC in the coolant tank. Replaced head gasket. Came back 4 days later with coolant lost again. Pressure tested ov...
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2000 GMC Yukon XL 1500 SLE 5.3L Abs VIN: 3GKFK16T5Y
Vehicle came in with 2 ABS codes c0227 and c0225. Both for front left wheel spd sensor. Changed sensor and cleaned senor mating surface and bore. ABS light is off and no codes but ABS still activates at low speeds. Pulled right side wheel apart and found senso...
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2003 GMC Sonoma SLS 4.3L Poor Idle Quality, Misfire VIN: 1GTDT19X43
truck came in for emissions readiness test not complete cat and evap won't set. car has a slightly rough idle and under load mil flashes dtd po303. new plugs were put in and another garage had told them the cats where blocked.. we put on two new cats. same res... Trouble codes: P0303
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2009 GMC Sierra 1500 SLE 5.3L ipc , and no start VIN: 2GTEK19J29
truck was towed in for no start ipc takes for ever to wake up no codes in truck prndl has no lines under it truck will not crank can not communicate with the following ipc , abs , ebcm , ddm , have checked all fuses all ok , removed fuse box and no corrosion h...
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2001 Oldsmobile Intrigue GL 3.5L Cuts out, Stall VIN: 1G3WH52HX1
Hi guys. This Intrigue has a strange problem. When trying to start the car, sometimes the dash will flash all the warning lights three or four times, then stop and go back to normal function. While this is happening, the car will not crank. After the flashing,...
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2003 Saturn Ion-1 2.2L No Start VIN: 1G8AG52FX3
I(ve tried to use the 30 minutes relearn procedure on this passlock system without success. The theft lite started to blink as soon as I crank the engine and never stopped. any clues ? thanks for your help.
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Fixes & Summaries for GM
Fix/Summary Answers
2003 Chevrolet Astro 4.3L No Start VIN: 1GNDM19X03
hi i whant to thank everyone for your help. the fix ended up being water driping on the computer .as yous know its by the master cylinder this thing must have been in an acident.so what i did was opened computer up cleaned with electrical spray and dried and s...
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2005 Chevrolet Silverado 2500 HD LT 6.6L theft deterrent VIN: 1GCHK29215
THANK YOU TO ALL, YOUR REPLIES MAKE US ALL SMARTER. I STARTED AT BASICS AND FOUND BAD GROUNDS AND NO GROUNDS FROM THE PERSON THAT DID MOTOR SWAP! REPLACED ENGINE HARNESS DUE TO GROUND VARIATIONS WHEN MOVING HARNESS TO GLOW PLUG MODULE. MODULE WAS N.G. FUEL LEA...
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2000 GMC Jimmy SLE 4.3L Hesitation, Cuts out, Stall VIN: 1GKDT13W3Y
Thanks for all the tips and suggestions everyone. Bottom line was it ended up being a fuel pump / connection issue. The pressure never dropped below 55 psi even when it was running crappy and backfiring. The last time I went to drive it with the pressure gauge...
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