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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 15, 2009
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Open Help Requests for GM
Help Request Answers
1999 Buick LeSabre Custom 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Misfire, MIL Lamp on VIN: 1G4HP52K6X
This one has me stumped. Two weeks ago vehicle came in running on four cylinders. I found a black post on two coils. I replaced both coils and engine ran fine. A couple of days ago the engine popped and quit running. It was towed in and I found no spark at all... Trouble codes: P0336 (CKP performance), P0706 (Transaxcle range switch performance), P1361 (IC circuit low voltage), P1362 (Ignition bypass circuit low voltage)
1998 Cadillac Seville STS 4.6L Unknown VIN: 1G6KY5493W
car came into the shop with service susp system on the dic,attempted to scan ,found p0503,p1602,p1642,could not comm with abs computer checked all grounds,repaired a couple of questionable ones but no change when car is test driven and problem ocurs,the a/c go...
2003 Cadillac Escalade 6.0L front brakes VIN: 3GYEK63N63
customer complains no power and shaking on highway front brakes are staying locked the only way to release them is to open the brake line either at each bleeder or the output line for each front caliper at the bpmvh once you do that and the calipers will relea...
2003 Cadillac CTS 3.2L Misfire, MIL Lamp on VIN: 1G6DM57N93
Vehicle came to shop misfire always customer states accessary drive (serpintine) belt broke engine overheated. Customer replaced belt and brought to shop. I retrieved codes pulled plugs from right bank and checked compression results 125 - 130psi. There is onl... Trouble codes: P0300, P0301, P0303, P0305
1996 Chevrolet Blazer 4.3L Surge, Misfire VIN: 1GNDT13WXT
Hello all this blazer first came in for a check engine light on and flashing at times had p0151 and 302 304 306 codes found tsb on this checked o2 sensor connector found corrosion changed o2 sensor and harness per tsb. customer had to have it right a way well ... Trouble codes: P0151, P0300
1996 Chevrolet Express 1500 5.7L MIL Lamp on VIN: 1GBFG15RXT
hello fellow techs have a problem child here. i have a van with a 5.7 with a continiuous po340.i have replaced the cam sensor ,crank sensor,with no change. so i go to my mitchell and go through the diagnostics chart.says to check voltage at signal wire. for 5-... Trouble codes: P0340
1996 Chevrolet K1500 Suburban 5.7L No Start
I have a 1996 Suburban that has NO injector pulse. It shows crank signal in RPM parameter on my Snap On scanner. There are no DTCs. The problem is intermittent. I was about to send the car home and it quit starting. It starts and runs fine with a shot of carb ...
1998 Chevrolet Express 2500 5.0L MIL Lamp on VIN: 1GCFG25M3W
this one is really becoming a headache please help Trouble codes: P0160
1998 Chevrolet Malibu 2.4L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire VIN: 1G1ND52T8W
Fellow Techs please help,I am missing something. This vehicle was towed into the shop. Stalled on customer while driving,It would restart but did not have any power and kept stalling. Initial inspection low power,smells rich, no service engine soon light,scan ...
1999 Chevrolet K3500 6.5L Cuts out, Poor Fuel Economy VIN: 1GCHK33F2X
we replaced the turbo on this truck because it was leaking oil bad. we did a direct injector flush for preventative mantinance. what happended is the customer said that the truck has been dieing intermittantly and it is getting about 4 miles less on fuel miled... Trouble codes: P1216 (fuel solenoid response time too short)
2000 Chevrolet S10 2.2L radiator VIN: 1GCCS1950Y
oil in coolant
2002 Chevrolet Suburban 1500 LT 5.3L Misfire, MIL Lamp on VIN: 1GNFK16Z62
Headache from Hell here. Sister in laws Truck and it will intermitantly set a code P0356 Ign Coil 6 control circuit. Feel the misfire when It occured to me once in the last 2 weeks and turned the light on. IM STUCK DRIVING IT till its fixed. She has my Truck. ... Trouble codes: P0356 (Ignition Coil 6 Control Circuit)
2005 Chevrolet Aveo LS 1.6L Hesitation, Surge, Cuts out, Stall VIN: KL1TD52685
car will hardly start in the morning and it will start if you spray carburetor cleaner in the throttle body. the fuel pressure is normal and it is 58 psi. clean fuel injectors and used motorvac machine and did the same thing. no trouble codes retrieved. it wil...
1997 Geo Tracker 1.6L blower motor VIN: 2CNBJ1363V
how do you get blower motor out ,got glove box out,motor manual not very helpful
2006 Pontiac Vibe 1.8L MIL Lamp on VIN: 5Y2SM65896
We have had a 2006 Pontiac Vibe, 2wd, A/T with the 1.8L (1ZZ-FE engine) come in with MIL on several occasions. First time it came in, No DTC's present using the Snap-On Modis. We use Global First, then GM specific through VIN. Neither one had codes or any stor...
2006 Pontiac Grand Prix 3.8L heater core VIN: 2G2WP55216
If you let this car idle a little while then accelerate there is a "gurgling" noise from under the dash. It doesn't do it if you pinch off the heater hose. Replaced heater core Which was 75% plugged but it made no diff. Put a vacuum pump on the bleeder screw o...
2000 Saturn SL1 1.9L readyness monitors VIN: 1G8ZH5289Y
before this car came to me. it was in a other shop for a emission test and failed with two codes p0410 secondary air and p0442 small evap leak. the car was then taken to advance auto parts and they cleared out the codes. car goes back to shop and now fails the... Trouble codes: P0410 (secondary air), P0442 (small evap leak)

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Riviera Luxury 3.8L Bogs light throttle* VIN: 1G4EZ13C2L
First - thanks for all the help and replies. For those that don't want the long story, I wouldn't have believed it if it didn't happen to me but a broken O2 sensor periodically shorting to ground was the cause. New O2, runs like a champ. I never experienc...
1993 Chevrolet S10 Blazer Tahoe 4.3L Poor Idle Quality VIN: 1GNDT13W1P
the cat was good the egr was hanging open a little, i put a new egr and nut kit on egr closes all the way now,thanks for your help i missed a comon reading thanks Trouble codes: 45.
1994 Chevrolet K1500 4.3L clutch VIN: 1GCEK14Z0P
thanks for all the replies, robert [...] hit the nail on the head. the clutch fork & ball were worn causing the clutch to be stiff. my mechanic failed to look at that while he had it apart. live & learn. have a great car repair day! david lee
1995 Chevrolet Astro 4.3L Forward gears VIN: 1GBDL19W9S
Here is what I have found. There was an extra steel in the overrun clutch. I'm assuming this would limit the travel of the forward clutch piston due to the extra width and the piston-in-piston configuration. Basically the overrun clutch would compress but trav...
1995 Chevrolet C2500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Stall VIN: 1GCGC24K1S
thank you for the advice. several reminded me to plug the breather which i did. no vacuum so i moved on. Replaced injectors and ecm and now it runs perfect. If I do Just one and not the other it just doesnt run right. So it needed a fuel pump, injectors and ec...
1998 Chevrolet C1500 Cheyenne 4.3L Surge, Cuts out VIN: 1GTEC14W5W
WELL, I will never, never, never install an after market fuel pump again. I didn't install this one, but it gave me heck. After all the great help, info and even a few cyber hugs, I have installed a new FACTORY fuel pump. Vehicle runs as it should and am going...
2001 Chevrolet Silverado 2500 HD 8.1L turn signals VIN: 1GCHK24G21
The replies that were sent to me had alot of great ideas, The problem was found after a lot of searching, at the front by the aftermarket snow plow. We found that the ground was not tight, it looked good but when we tightened the bolt all was back to normal. T...
2001 Chevrolet Silverado 1500 4.3L Fuel Gage VIN: 1GCEC19W01
Customer chose not to spend more time on vehicle. We did replace the pigtail to no avail and was going to flash the PCM next. The ground issue at the tank would only affect the pump not the sending unit, but we cleaned those up while tracking the wires back. I...
2002 Chevrolet Express 2500 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Stall, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GCGG25R02
Well Its confirmed, #6 cylinder which was not showing very many misfires was the culprit. 0 pounds compression, air leaking through intake. Valve or spring the van is out of commission in two months so the fleet decided to call it quits early. I guess some ... Trouble codes: P0300, P0101.
1996 GMC Jimmy 4.3L Surge VIN: 1GKDT13W9T
Thanks to all who replied. Mel & Mike hit it on the head. I had already replaced EGR valve, Maf Sensor with known good one's. I replaced spider injector because it was leaking but knew it was not responsible for surging.I noticed cam was 14 degrees, pulled dis...
2002 Other GM Vectra 3.2L Oil in water VIN: WOLOZCF683
Sorry for the delay guys, it took a while to source parts. Firstly a big thank you to everyone that replied, it really helped, as most of you pointed out, it was looking like the oil cooler that is mounted in the v of the block. We had the heads off any way so...
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