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Prev Professional Automotive Repair Technical Discussions for July 14, 2007
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1998 Chevrolet Corvette 5.7L No Start, Stall VIN: 1G1YY32G1W
This Corvette would not stay running for the customer. Stalled when put in gear and the column lock message appeared again. We read that GM was having trouble with the relay, so we installed another one and it started and ran fine for one day. The following da... Trouble codes: P1626 (anti-theft system fuel enable circuit), B2587 (column lock/unlock open or ground), B2723 (passkey detection circuit open or shorted), U1096 (undocumented), U1016 (undocumented)
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2000 Chevrolet Tahoe LT 5.3L heater core VIN: 1GNEK13T4Y
sloshing in heater core can be heard on excelloration.
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2001 Chevrolet Express 3500 8.1L a/c system VIN: 5B4LP57GX1
Customer bought vehicle that has been sitting in storage for some time. This Vehicle is actually a winnibago motorhome. When it came in there was no fron in the system checked for leaks found a/c compressor leaking. replace a/c compressor with a delphi unit. w...
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2000 GMC Jimmy Diamond Edition 4.3L 236 t-case VIN: 1GKDT13W1Y
eating my lunch big time customer says this has not happened before but we found the vac line was off so the system was not working right to being with but it is still my problem thanks for any help art
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2000 GMC Sonoma SL 2.2L MIL Lamp on VIN: 1GTCS1959Y
This customer has a problem with his service engine soon light coming on and we found, on two different occasions, codes P0178 & P0179. These codes are new to us because it is only for Flex Fuel models and they are not common around here yet. We priced out a n... Trouble codes: P1078, P0179 (Fuel Composition Sensor High Voltage)
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1999 Oldsmobile Intrigue GL 3.5L Cuts out, Stall VIN: 1G3WHS2H52
orignally car came in with code 336 so the tech replaced crank sensor and ran pin out test as per alldata, checked serial data on scan tool and found crank sensor still on time b.did crankshaft relearn, and cancelled the ck/eng light,but still on time b ordere...
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1972 Pontiac lemans 350CID Poor Idle Quality VIN: 2D69M2P198
I am posting this for a friend. If you pull off plug wires, on number 1 cylinder, the car seems to run almost the same. The other wires make a big difference when they are pulled off. Tried swapping wires with no difference. All plugs look like they are firing...
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1986 Pontiac Firebird 2.8L fuel pump VIN: 1G2FS87S4G
I have 1986 firebird that has no voltage at fuel pump. I cannot find the fuel pump relay, prime connector, and wiring diagram shows a fuel pump switch w/ 2 wires going to it a hot at all times orange wire and coming out is a tan/white wire, not sure where it i...
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2000 Pontiac Grand Am GT 3.4L Poor Idle Quality VIN: 1G2NV52ESY
Hello fellow technicians, This is a used car I bought for my 16 YO daughter, but I am not much of a GM tech. I work on Subaru's. But I jsut replaced the intake manifold gaskets and now intermittently when driving down the road the idle doesn't drop back down i...
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Fixes & Summaries for GM
Fix/Summary Answers
1995 Cadillac Eldorado 4.6L MIL off KOEO VIN: 1G6EL12Y9S
After take out the instrument panel we found all light bulbs ok . After re-install the panel we found that the light come on for a milisecond very close to the point where the switch will crank the engine .This seems to be ok on this kind of vehicles . Specia...
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1989 Chevrolet S10 2.5L No Start VIN: 1GCBS14E8K
Thanks to everyone that offered advice. I tried everything to communicate with the truck, even borrowed and old red brick scanner and nothing. The truck needs an ECM before I try to diagnose other problems, and as I said before, the truck is just not worth f...
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1999 Chevrolet K1500 Suburban 5.7L Misfire, MIL Lamp on VIN: 3GNFK16R9X
thank you for the quick response. i recieved replies within the hour that led me in the right direction. the vehicle was not running lean during the missfire telling me the lower than normal fuel preasure was not the offender. i pulled the dist cap off and fel... Trouble codes: P0300.
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1999 Chevrolet Silverado 1500 5.7L abs VIN: 2GCEK19T0X
Well in my attempt to help a friend a lot of things were overlooked. #1-left front caliper that was replaced was wrong caliper, f#*k. The truck is a Silverado edition not a regular pickup. #2 The car lot that he purchased the truck from sold a truck that was s...
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2003 Chevrolet Express 3500 6.0L Starting VIN: 1GBJG31U73
Thanks for the info. I have fixed this truck. THe password had to be relearned. The prcedure is as follows. 1. Attempt to sart and leave the key on 2. wait 10 minutes untill the scurity light goes out. 3. cycle the key of for 5 secounds 4. repeat steps 1 -3 ...
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1999 Oldsmobile Intrigue GL 3.5L Blows A/C fuse VIN: 1G3WX5248X
Some said the diode may be bad, and others said the clutch coil may be overdrawing... So I just swapped the compressor for another unit... That makes 3 now... so far so good... we'll see what happens...
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2002 Pontiac Sunfire SE 2.2L No Start VIN: 1G2JB12482
CHRIS WAS RIGHT. IT HAS BROKEN TIMING CHAIN GUIDE AND SLIP CHAIN ABOUT 30 DEGREE. REPLAQCED TIMING TENSIONER AND GUIDE, CHAIN AND SPROKETS. THANK YOU TO ALL.
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