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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 9, 2010
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Open Help Requests for GM
Help Request Answers
2000 Buick LeSabre Custom 3.8L Excessive Emissions, No Start, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1G4HR54K7Y
One tech at dealer said it was due to weak magnet on cam gear. So I replaced Timing chain set with new magnet, both cam & crank sensors, water pump. Proformed CKP relearn. Test drove and still cuts out and dies while driving. Looses tach function while driving... Trouble codes: P0341 (Cam Position Sensor)
2002 Cadillac Seville SLS 4.6L Mode Door VIN: 1G6KS54Y42
Hi all you GM techs, I need help with this one. Car came in only blowing out defrost. Hooked up Tech 2 found control was trying to switch the mode door but it did not move. I installed a new mode door assembly and it switches to all positions but has a problem...
1993 Chevrolet Camaro Z28 5.7L Excessive Emissions, Misfire VIN: 2G1FP22P42
1993 camaro z28 5.7l running rich and misfire when get hot but at idle when cold is fine no misfire or any problem when start up emmission is good but when it heat up start running rich and missing so any ideas out there chevy specialist. Thanks for the reply
1998 Chevrolet S10 LS 2.2L No Start VIN: 1GCCS1447W
Well I have another S-10 problem a customer brought me.This is a 98 2.2L,it had intermitent run problems, sometimes it would start and run fine,just die and not start, or not start at all.The customer installed a new delco(factory) fuel pump,new fuel pump rela...
2001 Chevrolet Blazer Trailblazer 4.3L MIL Lamp on VIN: 1GNCS13W01
we have this blazer that keeps setting code po440 for evap. large leak.i have smoked tested system several times and can not find a leak.i did find a hose at the canister that was not hooked up. alldata says ii goes to rollover valve on top of fuel tank but i ... Trouble codes: P0440
2003 Chevrolet Malibu 3.1L guages & warning lts VIN: 1G1NE52563
The car came in as a no start. Someone cleaned the inside with a garden hose and detergent. The BCM was not mounted like it should under the glove box with a cover over it, but was hanging down. the connectors got wet and corroded. I cleaned and tightened all,...
2004 Chevrolet Aveo 1.6L trans shifting erratic VIN: KL1JT52674
this came in for a trans shift issue when we test drove it we felt nothing except a missfire we in stalled plugs and wires drove miss went away returned to customer it came back the next week with the same concern test drove found the speedo bouncing everywher...
2004 Chevrolet Express 3500 6.0L Misfire VIN: 1CBJG31U94
hi everyone have this van which came in with check engine light on and misfiring, customer started to try to replace plug and wires and broken one plug wire and stop there, so we replace all spark plugs and wires, started it up and was misfiring scan tool show... Trouble codes: P0300
2005 Chevrolet Colorado Sport 3.5L Misfire, MIL Lamp on VIN: 1GCDT13655
This truck got a p0305 code i have switched coil put new plug my no 5 plug is always black like there is too much fuel check for vacuum leak but always the same p0305.i hear the injector at all cylinder and they have a good clincking sound could not do a balan... Trouble codes: P0305 (Misfire cyl 5)
2009 Chevrolet Express 2500 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCGG25U84
This problem occurs intermittentently at idle. Seems worse after it gets hot while driving and returns to idle at stops. Its missfiring no.1 cylinder bad when this happens. No.5 missfire counter is around 6 and no.7 missfire counts are around 7. When this happ... Trouble codes: P0172, P0300
2000 GMC Sierra 1500 SLE 4.8L oil level VIN: 1GTEK19V3Y
This truck has the oil level rising.The customer has drained oil out of it twice. The oil and filter was changed and it came up 2L in about 1200 km. When I changed the oil I marked the fill cap to see if this was having oil added without the customer being awa...
1999 Pontiac Grand Prix GT 3.8L maf VIN: 1G2WJ52M1X
we are having major isues with the maf.. it will not go over 2 grams of air. we replaced it with a few, some new and a few old. this always causes the mil to light up. at start up it builds up to 2 grams but then stays at that... we have checked for vacuum lea...
2001 Pontiac Grand Am SE 3.4L No Start, Security light on VIN: 1G2NF52E11
GOOD AFTERNOON TO ALL. SO HERE I AM AGAIN IN NEED OF HELP ON WHAT WILL PROBABLY TURN INTO A COMMON FIX.I HAVE THIS 01 grand am towed in 2 weeks ago no start security light flashing.I relarned the pats system all set.I did notice the key appeared originaland wa... Trouble codes: B2958 (Undocumented code), B2960 (Security system sensor data incorrect but valid), U1000 (Loss of class 2 seriel data), U1088 (Loss of sir sdm communication), U1128 (Loss of irc communication)

Fixes & Summaries for GM
Fix/Summary Answers
1987 Buick LeSabre Limited 3.8L Stall, Misfire VIN: 1G4HR5733H
First off thank-you too all who replied. This has been a most troublesome repair as it started after another procedure(timing chain)was performed. This a beautiful example of a vehicle running with more than one problem. Symptom Stalling, computer reporting C...
2003 Cadillac DeVille DTS 4.6L No Start VIN: 1G6KF57973
Alright guys, this car is fixed! Ended being a bad PCM as well. Most likely it went bad from the lack of ground that the engine block was suppose to supply, but couldn't because the ground wire from the body to the block had broken in two. Costomer brought a... Trouble codes: U1000 (Class 2 malfuction).
1997 Chevrolet S10 4.3L Excessive Emissions, Poor Idle Quality, Stall, Misfire, Poor Fuel Economy VIN: 1GCDT19XXV
thanks for all the help i found that the cam angle was -18 so i checked the timing chain and it was shot so they are not fixing it Trouble codes: P0300.
2001 Chevrolet Venture LS 3.4L valve train VIN: 1GNDX03E61
I found two lifter rollers flat. Replaced all lifters with new ones. Luckily the cam was not badly damaged. This van has been running 200 miles a day for a week now without any news.
2001 Chevrolet S10 LS 4.3L Hesitation, Cuts out, Misfire, MIL Lamp on VIN: 1GCCS19W81
Well I got It fixed finally,I had to shim the crank position sensor away from the reluctor wheel,.050.I had put a new timing cover on it and there not always the same dimentions where the sensor mounts.Also had to modify the dist. mounting to dial in the timin... Trouble codes: P0341.
2001 Chevrolet Blazer LT 4.3L oil leak VIN: 1GNDP13W01
Got this in today, at last. Front timing chain cover was leaking. Got a new one at dealer and all is well in Blazer land. I thank all who took the time to respond. Danny
2002 Chevrolet Venture 3.4L Fuel Gauge VIN: 1GNDX13E92
First I would like to thank everyone for their help. I have overlay the sending unit circuit to the PCM and this did not correct the problem. I instructed the customer that the problem was either in the PCM or the Cluster. I am leaning toward the cluster bu...
2004 Chevrolet Trailblazer EXT LS 4.2L under temp VIN: 1GNET16S44
after re ckecking wires noticed on scan tool temp would go to-5 when my hand touched wires going into sensor.install another new sensor problem fixed.thanks for the help
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