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Professional Automotive Repair Technical Discussions for February 25, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2005 Buick Century Custom 3.1L security VIN: 2G4WS52J45 Help This car has been driving me nuts for a week now It has a interment no start It will just crank and crank I have fuel presher and spark and I get a inj pulse with a lab scope I have put a module on it and 3x crank sensor and this did not help I put new pl... |
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| 1999 Cadillac DeVille 4.6L compressor VIN: 1GCCS1438K This car came in with the customer saying the compressor needed replacement. He took it to cadillac and they diagnosed it. Well guess what? It needs something else. It has a low pressure message even though I topped it off and replaced the high and low side se... |
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| 2001 Chevrolet Express 1500 5.7L noise VIN: 1GBFG15RX1 thanks in advance, customer came in to our shop with 2 complaints . first was a water leak , and secondly was a noise in the engine the water leak turned out to be an intake gasket , we replaced it and both noises diappeared. one week later customer calls and... |
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| 2001 Chevrolet Blazer LS 4.3L Misfire, MIL Lamp on VIN: 1GNDT13W51 This is an MTA vehicle,so it is well maintained.the shop could not figure out the reason for the miss so they sent it to me.I scaned the vehicle got P0300 and P01345, data showed cyl 5 and 6 misfiring and cam retard at 1000rpm at -21 deg.I noticed the distr. w... Trouble codes: P0300 (mult cyl missfire), P1345 (ckp/cmp correlation problem) |
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| 2003 Chevrolet Suburban 1500 LT 5.3L transfer cas VIN: 1GNFK16Z23 This truck has been a problem for 8 months or so on and off. The dash says service 4x4 when it first came in, serviced fluids and tried to reset dash indicator, that was unsuccessful. The 4x4 works most of the time. Second repair, changed 4x4 wire harness whic... |
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| 2003 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 1GCEK19V13 hello techs ; we have this chevy truck with po449 emission fault code , any help would sure be appreciated all data is down [again]snappy says evap vent control is open,-short to ground -no voltage ?? where is this vent control located. tia-- t.f. |
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| 1993 GMC C1500 Sierra 5.7L No Start VIN: 1GTBC14K9P was towed in needing fuel pump would not start after repair. advanced dist timing. base timing now at 15 decrees. it ran for 1 day. timing chain had 10 degrees slack. replaced it. still no start. has good spark thru. the plugs has fuel thru injectors.will not ... |
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| 2002 GMC Sierra 2500 6.0L cranking motor Hi Duramax specialists, I have a dirt road Duramax with 104,000mi that looks like 400,000mi. The problem is that the engine cranks at any time, with the key in the on position the starter will just engauge and start cranking the engine even when the engine is ... |
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| 2004 GMC Savana 3500 6.0L Misfire, MIL Lamp on VIN: 1GTHG39V34 Hi iATN, I'm having a hard time with this truck. P0300 random misfire with MIL flashing. All cylinders have a recorded misfire with #1 with the most amount. Inspected spark at #1 it will sometimes have inconsistant spark. Injector pulse is okay and injector si... Trouble codes: P0300 (Random Cylinder Misfire) |
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| 2005 GMC Sierra 2500 HD 6.0L signal,headlites VIN: 1GTHK29V65 hi..cannot communicate with genisys..all fuses and relays good underhood..cab grounds checked and cleaned..with key on r.h.headlite dim at all times..l.h. signal on dash indicators flash fast..hi beams and l.h.indicator on all front signal and headlites lo and... |
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| 1985 Pontiac Fiero GT 2.8L MIL Lamp on VIN: 1G2PG3791F This Fiero was in a few months back for a no start. The fuel pump relay and the oil pressure switch were both bad. The vehicle breaks down on a road trip and tech says the ECU won't turn on the fuel pump and installs a toggle switch to get my customer home. A... |
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| 2004 Pontiac Grand Prix GT2 3.8L headlamps VIN: 2G2WS52294 hello there, thanks for all the replies in advance. I have a 03 grand prix, 3.8, the right headlamp works fine, both low and high beam. the left lamp doesn't work on low beam, only on high. i have no power at the right connector, following wires back to the fu... |
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| 1997 Saturn SW1 1.9L Misfire, MIL Lamp on VIN: 1G82H8288V The check engine light is on with code P0302B. After looking at Data Base Injector cleaner with Techron has been run thru it several times. The car is due for emission test. After clearing code I can watch misfires for cyl 2 increase on scan tool. There doesnt... Trouble codes: P0302 (cyl 2 misfire) |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1998 Cadillac Seville STS 4.6L power windows VIN: 1G6KY5495W I CHECK BUSS WIRE AT EACH SWITCH HAD 10 VOLTS,I OPENED DRIVERS SWITCH FOUND IT TO BE CORRODED INSIDE.I REPLACED DRIVERS SWITCH AND ALL WINDOWS WORKED AS DESIGNED. |
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| 1988 Chevrolet C3500 Cheyenne 7.4L 4L80E Conversion VIN: 2GCHC39N1J Sorry to keep you all in suspense over this conversion, but the customer has yet to make a decision. I had 19 replies from you all, and almost as many opinions. There are many companies that offer stand-alone units, and the one that sounds the best to me is ... |
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| 1991 Chevrolet S10 4.3L Cooling system VIN: 1GCCT14ZOP Thanks to all that replied. Intake gaskets installed backwards. I believe customer may not have been honest about engine running fo two months after replacement with no overheating issues. So thats what you mean by! (BACK TO BASICS) Again thanks to all that re... |
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| 1994 Chevrolet C2500 5.7L fuel system VIN: 1GCFC24H2R thanks for all your help. In the end the fuel began to pump. still would not start, located faulty coil. the faulty coil caused the timing to jump. so had to reset the timing. vehicle runs like new. thanks for all your help. |
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| 2003 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14X83 Thanks to all who replied. I applied all the suggestions I received and still no result. The crank sensor was a new aftermarket part. Decide to replace it with OE part and bingo, the truck is fixed. Trouble codes: P0335 (Crank sensor circuit A). |
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| 2005 Chevrolet Aveo LS 1.6L No Start VIN: KL1TD62675 THE PROBLEM I FOUND WAS THE BASE IDLE WAS TO LOW. I RESET THAT AND THEN PERFORMED IDLE RELEARN PROCEDURE. ALSO FOUND SCHRADER VALVE ON FUEL RAIL LOOSE & LEAKING. |
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| 2006 Chevrolet Colorado LT 3.5L MIL Lamp on VIN: 1FTUX17216 LIGHT HAS NOT COME ON SINCE IT WAS HERE LAST. THE ONLY THING I DID WAS UNPLUG THE MAP SENSOR TO LOOK AT THE CONNECTOR. MAY HAVE JUST HAD A BAD CONNECTION. Trouble codes: P0108 (map sensor voltage high). |
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| 2000 GMC Safari SL 4.3L Misfire, MIL Lamp on VIN: 1GTDM19W0Y Well thanks to all that said valve guides. We talked our local machine shop and they have been doing a ton of them. So we pulled the heads and sent them out and had a full valve job done on both. We put the vehicle back together and everything seems to good. T... Trouble codes: P0300. |
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| 2002 GMC Envoy SLE 4.2L MIL Lamp on VIN: 1GKDT13SX2 First off I would like to thank those of you that responded. The actual cause of the problem was kind of strange and I still can't figure out why it would leak with negative pressure but not positive pressure. The fix was the fuel sender seal. We ended up p... Trouble codes: P0442 (Small Evap leak). |
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| 1998 Pontiac Bonneville SE 3.8L Poor Idle Quality VIN: 1G2HX52K7W Well sorry for the delay in post i had totally forgot this was opened. After everything i did the owner wanted to take the car to the dealer. And as i wanted to the dealer put an 02 in it and all is fine. i didnt want to guess because if i spent money with no ... |
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| 2003 Saturn L300 3.0L security VIN: 1G8JW54R53 found wire under dash pinched.must of happened during installation of a auto start unit. |
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