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Professional Automotive Repair Technical Discussions for March 31, 2011 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1996 Chevrolet K1500 Silverado 5.0L Poor Idle Quality, Misfire, No power VIN: 2GTEK19M8T Hi all, I thought I was a GM guy, but every now and then... So this truck came in from another shop. It has lots of new parts, but it runs like crap. Number 7 cyl is a dead miss. The thing that puzzles me is number 7 plug is always wet with fuel when I remove ... Trouble codes: P1345 (Cam timing issue) |
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| 1997 Chevrolet C1500 Silverado 4.3L No Start, Stall, MIL Lamp on VIN: 1GCEC14W5V I bought this truck from a customer who towed it in at 62000 miles with a no start issue. We checked and found it needed a fuel pump. The customer supplied an aftremarket pump (unknown brand) which was fitted. The vehicle ran great and was then taken over by m... Trouble codes: P0134 (Oxy.sensor), P0135 (Oxy sensor) |
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| 2001 Chevrolet Suburban 1500 5.3L Transfercase VIN: 1GNFK16T51 Please help this np8 246 t-case is leaking out both the output shaft seals, for front and rear prop shafts. Both seals have been replaced two different times, after the complete rebuild mentioned in repair history we put in the new blue auto track2 fluid. I ha... |
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| 2003 Chevrolet Tahoe LT 5.3L Rear hvac VIN: 1GNEK13Z13 Here's the problem. I have good heat up front, air temp 140-150 degrees, rear air temp when checked following long 20 mile road test would barely reach 80 degrees. checked hose temps at rear unit, outlet side was very cool, almost cold to the touch, while inle... |
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| 2004 Chevrolet Suburban 1500 LT 5.3L temp doors VIN: 1GNEC16Z04 on the back of the control head are two dark blue wires, one for the left side temp door motor and one for the right side. when moving the temp control knobs, i have varying voltage on one side(right), but not the other (left, driver side). after verifying thi... |
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| 2006 Chevrolet Silverado 2500 HD LT 6.0L Abs VIN: 1GCHK29U56 This truck sets a C0035 left front wheel speed sensor code, I have replaced the EBCM because it was cracked, and the left front speed sensor because the wires were rubbed. If you clear the codes and test drive the code sets emmediatly and the sensor never read... |
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| 1999 GMC Sonoma SLE 4.3L No Start VIN: 1GTCS19X1X Customer had complained of this issue about 2 or 3 times a month. Intermittent. The security light at times flashes while driving. No vehicle codes present. After sitting sometimes vehicle wont restart. Pretty sure its security related because after sitting an... |
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| 2003 GMC Envoy XL SLT 4.2L MIL Lamp on, No Acceleration VIN: 1GKET16S23 Customer called a few days back, said engine was not running right, engine miss. Vehicle was towed in with no throttle response (no acceleration at all). I found #2 coil shorted to ground. Now there is no engine miss, but the 1512 code will not reset, and if u... Trouble codes: P1512, P1515 |
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| 2004 GMC Sierra 1500 SLE 5.3L Poor Idle Quality, Misfire VIN: 2GTEK19T04 This truck has a rough idle and a consistent misfire on #6 and a inconsistent misfire showing on #5. New wires & plugs, swapped coils with other cylinder with no change. There are TSBs for bad ground on head, alarm system interference, intake gaskets, cracked ... Trouble codes: P0300 |
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| 1999 Pontiac Grand Prix GT 3.8L Stall VIN: 1G2WP12K5X what I have is drive it awhile shut it off and restart it doesn't stay running .It will stay running if you throttle it alittle bit.Tryed different iac still the same.When cold you start it acts normal.The other problem is when your driving the tach moves 200-... |
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| 2000 Pontiac Bonneville SE 3.8L Low Trac Light comes on Intermittently VIN: 1G2HX54K8Y Hi & Thanks in advance for reading this lengthy one. Not sure if there is necessarily a problem here on not? The Customer probably veiws it as a problem but it may actually not be I just can't explain it with good enough reasoning. Complaint is "Low Trac" ligh... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1995 Buick Park Avenue 3.8L Poor Fuel Economy VIN: 1G4CW52K0S Thanks eveyone for replying, the fix was a know good operating ecm from the wrecking yard. I think part of the wild goose chase had to do with the car not being OBD2. I had added extra grounds on the ground curcuit under the Ignition module. I could unplug the... Trouble codes: P0703, P0501, P1361, P0101, P0705. |
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| 2003 Chevrolet Silverado 1500 HD LS 6.0L Hesitation, Surge VIN: 1GCGK13U13 Well, thanks to all for taking the time to help. This one is fixed. Answer = MAF sensor. Most popular answer was fuel pump, but, as indicated in my update to post, the pressure was in spec even though at low end. Volume test was good and did not want to do pum... |
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| 2004 Chevrolet Impala LS 3.8L Poor Idle Quality, Stall VIN: 2G1WH52KX4 Well this is fixed. I over looked the o2 data on the scan tool as it was switching from 300 mv to 1100 mv thinking it was close enough. The fact was the o2 read high and the PCM leaned out the mixture when it went into closed loop. Believe the fuel trim number... |
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| 2005 Chevrolet WORKHORSE 4.8L Poor Idle Quality, Stall, MIL Lamp on VIN: 5B4KP42V55 WELL ITS FIXED. APPARENTLY THE MULTI CONNECTION AT AND THROUGH THE FIREWALL WAS FULL OF WATER. THESE WORKHORSES LEAK LIKE A SIVE. AS FAR AS THE DUTY CYCLE VOLTAGE ON THE #1 TP 5 VOLT REFERENCE. I COULD NOT TELL YOU WHATS GOING ON THERE BUT LIKE ALEX SAID I THI... |
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| 2006 Chevrolet C4500 Kodiak C4C042 6.6L MIL Lamp on VIN: 1GBE4E1296 the customer needed his truck back it is his main work vehicle, was able to do some further checks, i do have 2 bad glow plugs, the module seems to be working, talked to customer and told him we need to replace glow plugs to start and may need more after that ... Trouble codes: P0381 (Glow plug heater indicator). |
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| 2007 Chevrolet Silverado 1500 LS 4.8L No Start VIN: 1GCEK19C97 Hi, I would like to thank everyone who took time to get me on the right track to fix this truck. Turned out to be the ECM. Had no signal leaving as some of you suggested. The customer took the truck to GM because he had doubt that a truck this new would need a... Trouble codes: P0230. |
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| 1992 Oldsmobile 88 Royale 3.8L MIL Lamp on VIN: 1G3HN53L0N i believe this one is fixed. I removed the new ignition moduleand put the old one back in. Check engine light went out but it stalled. Orderd a new module and put it in. It never stalled but the check engine light came on. I replaced the PCM and the light has ... Trouble codes: 42 (electronic spark timing problem). |
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