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Professional Automotive Repair Technical Discussions for September 14, 2012 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1996 Chevrolet C3500 7.4L MIL Lamp on VIN: 1GBJC34J9T Truck came in for mil light on - p1345 crank/cam correlation. No driveability problems what-so-ever. Cleared code, came back with-in seconds of engine restart. Found tsb for this code with revised flow chart diagnosis. Followed flow chart and i feel i have hit... Trouble codes: P1345 (Crankshaft position / camshaft position sensor correlation) |
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| 2001 Chevrolet Impala 3.4L Hesitation, Misfire, studders VIN: 2G1WF55E31 This vehicle when shifting at 2800-3200 rpm would shudder/pop/and misfire. If I pull it down in 1 or 2 and accelerate to that rpm range it will act up consistantly. After unplugging egr went away. replaced egr and checked passages same result |
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| 2002 Chevrolet Venture LS 3.4L No Start VIN: 1GNDX03E82 Greetings fellow techs, Got one in today that has us scratching our heads a little bit. 2002 Chevy Venture Van with a ton of miles (278048) and beat to death was towed in. Customer stated the van just died while driving. Van will not crank with the key-everyth... Trouble codes: U1000, U1096, U1040, U1305 |
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| 2003 Chevrolet Silverado 2500 HD 6.6L Surge, Misfire VIN: 1GCHK23183 Customer stated at times the vehicle will begin to run rough even misfire according to the customer, he informed me that the vehicle has a bully dog "triple dog" so i ask him to return it factory settings, he did so and i cleared the codes and ask him to drive... Trouble codes: P0234 (Turbo overboost), P0500 (Vss error), P1094 (fuel rail low wheel idle or fuel cut), P1621 |
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| 2006 Chevrolet Uplander LS 3.5L C0040 Rt front wheel speed sensor fault This van has the ABS light coming on randomnly. The code is C0040- RF wheel speed sensor circuit fault. We tested according to AllData and the replace the rt front Hub Assyl. Drove a couple miles and the code came on again. Cleared code and drove prox 15 miles... |
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| 1993 GMC C1500 Sierra SLE 4.3L Temperature Door VIN: 2GTEC19Z2P Hello dear IATN staff, we are working on a 1993 gmc sierra with automatic a/c system, the a/c and heater works, but when engine is started, there is a kicking sound cumming from the a/c evaporator housing, it sounds like the door actuator is trying to keep pus... |
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| 2003 GMC Yukon XL 1500 SLE 5.3L Stall VIN: 3GKEC16Z23 I dont have a whole lot of information the car just shuts off driving down the road the last time it happened was after about 10 miles of driving, both times it happened to me it restarted right away, my customer said it was hard to start a few times after sta... |
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| 2004 Hummer H2 6.0L Ignition Cylinder VIN: 5GRGN23U04 Key will go into and out of ignition lock cylinder but not turn. None of vehicles keys will work now in ignition. I have a new cylinder but need to be able to rotate it 1 more time to get it out. I have tried spraying brake clean and compressed air into cylind... |
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| 1999 Oldsmobile Alero GLS 3.4L lifters VIN: 1G3NF52E4X Hey guys Im a little ashamed asking about this that I should know how to.I did a head job on this car because it overheated and lost compression.put it back together and know the lifters nock real bad and I get po300 engine runnig rough, Im almost certain that... |
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| 2001 Pontiac Firebird 3.8L vtd VIN: 2G2FS22KX1 morning all.vehicle came in with security light on soild.i can not comunicate with bcm using the tech2.all powers,grounds are good.i can get into all other modules.the car does start and run fine.i replaced the bcm w/gm unit,now the security light flashes,trie... |
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| 2004 Pontiac Grand Prix GT1 3.8L misc body VIN: 2G2WP52204 Car was bruoght in from body shop. After being lightly damaged in left front nothing works. No crank,windows,radio,etc. Scan for data cannot communicate with BCM. Followed diagnostics and thought I had a bad BCM. Got a remanufactured BCM from GM and called our... |
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| 2004 Pontiac Grand Am SE1 3.4L Starting VIN: 1G2NF52E74 this came in today coustomer complaining about poorpower and horible gas mileage, convter was glowing. ran diagnostics found no codes, history u1000 class 2 data link malfuction, eninge has no ignition until about 15sec of cranking (gradualy comes to life). ca... |
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| 2006 Pontiac G6 3.5L cruise control VIN: 1G2ZG55836 Hello I don't have alot of time working on cableless throtle yet so don't know what to check next.I checked on the scanner and saw that the switch worked when in engine all buttons worked.But when I go to trans data the cruise and the track are off and when I ... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1999 Buick Regal LS 3.8L No Start VIN: 2G4WB52K3X This one is fixed with a Labotomy. Disconnecting the battery all night seems to be what has the injectors back on line - at least I have no other explanation as to what did the trick... Turns out the coolant leak was more severe than I anticipated - ended up d... Trouble codes: P0300 (Misfire General). |
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| 1971 Chevrolet Chevelle Malibu 5.7L Fuel Gauge Still trying to figure this out. Special thanks to Steve from Power Electronics who took the time to contact me by phone and is still helping with advice and tests to try. Thanks to everyone else who responded. I'll update the post after we get it figured out.... |
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| 1984 Chevrolet P30 7.4L Stall, Misfire VIN: 1GBJP37W4E Hey guys, so here's the deal. Base timing and total advance were dead on, the cam was inspected during the rebuild and deamed okay, correct break-in procedure and oil were used and, the carb was rebuilt as suggested. Once the carb was back on it ran worse than... |
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| 2006 Chevrolet Tahoe Z71 5.3L Hesitation, MIL Lamp on, Reduced Power, Locks VIN: 1GNEK13T56 Hi again, everyone, and thanks again for your help. I'm happy to report that this vehicle is fixed. I probably should've posted this help request earlier, since I found the problem on my own as soon as I posted it. Funny how that works sometimes, isn't it. Ho... Trouble codes: U0107 (Lost communication with Throttle Actuator Control TAC Module), U1000 (Class 2 Datalink fault), C0244 (EBCM control valve/PWM delay torque fault), C0240 (EBCM fault/PCM indicates TCS fault), C0196 (Yaw rate circuit fault), C0455 (Steering wheel position sensor fault). |
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| 2004 GMC Yukon XL 1500 SLT 5.3L 4wd System VIN: 3GKFK16T64 well thanks to every body. i went and replace the encorer disconnect the battery for a minute or two and it fix the problem the truck is fine now |
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| 2006 GMC Envoy XL SLT 4.2L Stall VIN: 1GKES16S66 WELL THIS VEHICLE WAS A CHALLENGE, THE PROBLEM WAS TO INTERMITTENT, I HAD TO DRIVE IT ROUGHLY 40 MILES TO GET THE PROBLEM TO HAPPEN, I PIN TESTED EVERY MODULE ON THE CAR, INCLUDING THE PASS LOCK SYSTEM AT THE IGNITION SWITCH, I ADDED GROUNDS, FROM THE BATTERY ... |
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| 2003 Pontiac Montana 3.4L Starting VIN: 1GMDX13E03 Good call all it was a bad main ground at block.Thanks to all to get me looking at the right place. |
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| 2003 Pontiac Bonneville SE 3.8L Cuts out, MIL Lamp on VIN: 1G2HX52K93 thanks for the advice, installed new computer re-flashed and car runs great the signal from pcm to map and air flow sensor was wrong voltage bad pcm thanks larrys Trouble codes: P0101, P0121, P0108. |
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