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Professional Automotive Repair Technical Discussions for June 24, 2008 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1994 Buick LeSabre Custom 3.8L No Start, Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1G4HP52LOR hi everyone, I have a good one here, this car has an intermitten no start. The cam and crank sensors have been replaced along with the icm and pcm. Still having a no start condition once in a blue moon. It is not consistant, have checked all related wiring an... Trouble codes: P0341, P0342 |
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| 1992 Cadillac DeVille 4.9L power falls off VIN: 1GC6CD5382 HI Guys, This Cadillac has never been worked on by anyone else but us since it was new. The owner passed away and his wife now drives it. She brings it in having a loss of power after driven over thiry or forty miles. Pull the car over and shut off the engi... |
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| 2004 Cadillac CTS 3.6L brake lights VIN: 1G6DM57774 only has middle brake light, no r-h or l-h brake light. have checked fuses under hood and under rear seat. also emg. flasher only works lower amber lights.i think maybe brake singal wire goes through turn singal switch. brake lihgt switch is working, thanks fo... |
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| 1995 Chevrolet Camaro 3.4L Poor Idle Quality, Misfire VIN: 2G1FP22SXS Dear chevy techs, I have this 95 chevy camaro that came in for misfire problem. During diagnosis, checked spark plugs and wires(ok), this has the OBD II connector, but does not give misfire codes. Ran cylinder power balance through scan tool, and when deactiva... |
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| 1995 Chevrolet Blazer 4.3L Hesitation, Surge, Stall VIN: 1GNCS13W8S Hi guys, This truck had a GM long block installed, about 5000 miles ago. My customer bought the car with this problem. He was told that it ran good after the engine was replaced, and quit driving it when it started running bad. It sat for about 2 years. When i... |
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| 1995 Chevrolet Corsica 3.1L No Start VIN: 1G1LD55M9S Customer states that he tried starting the car after sitting a while and it would crank but not start. During cranking the belt tensioner broke and the belt fell off. At that point he had it towed. Testing revieled good spark but no inj pulse. Tested crank and... |
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| 1996 Chevrolet S10 2.2L Poor Idle Quality, Hesitation, Stall VIN: 1GCCS144XT results from diagnostic tests showed code for high map voltage, checked map with vantage and vac pump- all checked good. Did smoke test for vac leaks but didn't find any. Checked fuel pressure at idle it was in the low 40's. The truck will not take fuel past 1... Trouble codes: P0108 |
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| 2001 Chevrolet Express 3500 5.7L No Start VIN: 1HGCHG35R4 van towed in , no starting. van started for about 2,minutes. and ran good with no misfire or hesitation. then died, no start again. fuel press. at 55psi. found dist. cap had white corosion, replaced hole distributor with ac delco, cap and rotor. good spark and... |
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| 2001 Chevrolet Express 1500 5.0L MIL Lamp on Sorry about the lack of certan info this is a over the phone problem. This van came in failing I/M with a P0160 no activeity on bank 2 sensor 2. The funny thing is that it has no bank 2 sensor 2! 2 o2 sensors at the exhast manifolds and one after the cat (B1S2... Trouble codes: P0160 |
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| 2003 Chevrolet Express 3500 6.0L Poor Idle Quality, Misfire VIN: 1GBHG39U43 van will intermittently sart running poorly. missfire counters show 2,4,6,8 all miss fire. problem will come and go. looked at injetor amp ramp and no problems there. also amp ramped coils still no problems found. Trouble codes: P0300 (random miss fire) |
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| 1990 Geo Prizm 1.6L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1Y1SK7169L OK I am puuling my hair out on this one!! The car starts fine, sometimes when it is cold it will stall one ot two times right away, but starts right back up. As you start to drive it (with no warm up period) the car runs GREAT, but then after about 3 to 4 city... Trouble codes: 12 (No RPM signal for 2 seconds) |
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| 1997 GMC C3500 Sierra SL 7.4L starting system VIN: 1GDKC34J1V This truck has a long crank time, 5 to 10 seconds on cold or hot starts. Truck will idle and run great after starting and all sensors are within range while idling and road testing. Origional platinum spark plugs still looks great, spark plug wires checked out... |
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| 2005 GMC Yukon Denali 6.0L Unknown VIN: 1GKEK63U15 Good Evening everyone. I have an interesting one tonight. We had an 05 Denali towed in after being severely overheated. The customer drove the truck very hot for a while and shut it down too late. The truck got towed off the parkway. It was then towed to the d... |
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| 2001 Oldsmobile Aurora 3.5L Starting VIN: 1G3GR64H91 Vehicle came in on hook after sitting for approx 2 yrs. Cust stated batt would not hold chrg. Customer had wrong battery installed in car. We HAD car running told customer he needed correct vented battery for car. Batt goes under seat. Got go-ahead, installed ... |
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| 1992 Pontiac Bonneville SE 3.8L no spark VIN: 1G2HX53L8N Hello, this 1992 bonneville was towed in. good fuel, good injector pulse but no spark. we replaced the module and coil. this is the magnavox design ( one coil with 6 towers) and spark plugs. the car does now start but runs poorly after this. we replaced the cr... |
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| 2003 Saturn Ion-3 2.2L Misfire VIN: 1G8AK52FX3 Good evening and thanks. This Saturn had MIL light on several weeks ago and local Cheveron station scanned and found code P0300, replaced origninal spark plugs with new NGK Platiniums. Returned car to customer and several days later MIL returned. Dropped into ... Trouble codes: P0300 (random miss fire) |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1999 Cadillac Seville STS 4.6L no compressor engagement VIN: 1G6KY5498X WELL IVE DONE EVERYTHING EVERYBODY SUGGESTED FROM DISCONNECTING BATTERY TO REPLACEING BOTH SWITCHES AND EVEN REPLACED IPM AND STILL CHECKING.DID FIND RECIRC.DOOR BROKEN AND ACTUATOR BAD BUT THAT SHOULD NOT KEEP A/CFROM WORKING.THANKS FOR ALL THE SUGGESTIONS WI... |
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| 1987 Chevrolet V30 Silverado 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Stall, MIL Lamp on VIN: 1GBHV34K7H Hi Guys, Well, it turned out to be a combination of things as it usually does. The egr was sticking intermittently. The spark plugs were gapped too big by customer but I think the major problem is a timing chain that needs replaced but the customer declined... Trouble codes: 33 (MAP sensor). |
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| 1998 Chevrolet Express 3500 LS 5.7L Poor Idle Quality, Surge, MIL Lamp on, low power VIN: 1GNHG35R6W Well thanks to all that replied. We got the van fixed. I Drilled holes in the exhaust to make sure the converters are not pluged, it made no difference. Ended up puting in a new MAF and it runs alot better. The engine load is still low but we have a converte... Trouble codes: P1153 (bank 2 sesnor1 not switching). |
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| 1999 Chevrolet Malibu 2.4L MIL Lamp on VIN: 1G1ND52T8X Replaced ignition lock cylinder and IAC, it has now been a week and a half, customer got emmission test done, and the light is not on. Thankyou very much for all of your posts, they were instrumental in my diagnosis of this vehicle. Trouble codes: P2965, P0507. |
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| 2001 Chevrolet Silverado 2500 HD 6.6L Mechanical VIN: 1GCHK241X1 Thanks to everyones replies.We installed a new gm reman.We lost line pressue all together after further diagnosis.After speaking to reputable trans shop we found that the pumps do disintegrate & torque convertors on these,especially the first year they came ou... |
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| 2003 Chevrolet Impala 3.4L No Start VIN: 2G1WF52E43 The problem was the after market radio when we unplugged it would let the programing work also we had a bad BCM (dealer) |
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| 2005 Chevrolet Express 3500 6.0L Poor Idle Quality, Hesitation, Surge, Misfire, MIL Lamp on VIN: 1GCHG35U55 Thanks to all who replied did not want to post fix until vehicle went for a few weeks with no problems. Seems that the dealer may have been in the right area but wrong fix. They first replace injector 6 and problem was gone for a week or so then they replaced ... Trouble codes: P0103, P0174, P0300, P0356. |
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| 2006 Chevrolet Silverado 3500 LS 6.6L No Start VIN: 1GDJC39256 well it runs again, I would like to thank all the replies, John and Brian for the extra help and Larry for assuring me the pump will come out of there with some wiggling. We found out that the duramax hates water, the pump would not pump above 458psi, replaced... |
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| 1998 Pontiac Firebird 3.8L evap core VIN: 2G2FS22K5W THANKS FOR ALL THE GREAT INFO , WHAT I FOUND WAS THE EVAP. CORE WAS PRODUCING BOTH COLD AND WARM AIR . ONCE I REMOVED THE HEATER CORE TO GAIN ACCESS TO THE EVAP, THE LOWER CORNER WAS ACTULLY BLOWING WARM TO HOT AIR . I GUESS THERE MUST BE A BLOCKAGE IN THE EVA... |
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