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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for November 29, 2011
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Open Help Requests for GM
Help Request Answers
1993 Buick Century Special 3.3L Excessive Emissions VIN: 1G4AG55N3P
Hey guys, Ok , ive got this 3.3l Buick with elevated nox at 15mph and 25mph.failing ASM here in CA. Around 1000PPM at both speeds.Intrusive catalyst test found less than 50 % reduction of Nox.Replaced cat 2 times with aftermarkets , same results. Fuel pressur...
2001 Cadillac Seville STS 4.6L MIL Lamp on VIN: 1G6KY54941
Thanks in advance, I have a real problem child here. All items have been changed for air pump system and it will set 410 code within three hot and cold starts. I have checked flow to valves(good), put vac. on valves to see if good(hold vac), air solenoid valve... Trouble codes: P0410
1994 Chevrolet Camaro 3.4L No Start, Poor Idle Quality, Stall, Misfire VIN: 2G1FP22S4R
Vehicle came to me with a no start after sitting 1 hour. When I got the vehicle it started right up and ran OK for 20 minutes. Engine began to run rough, catalyst got cherry red and then stalled and would not restart. Ran OBD1 self test and no codes found, cod...
2003 Chevrolet Tahoe LT 5.3L inside cabin temp VIN: 1GNEC13Z53
temp difference on drivers and passangers 20 degrees or more even though both temp set the same look like doors are working counts look ok tried controlhead any help would be great thanks
2006 Chevrolet Equinox LT 3.4L Stall, MIL Lamp on VIN: 2CNDL73F76
the suv has been towed into the shop 3 times after a stall and no start. started at the shop both times. 1st visit: battery failed a load test and fuel pressure and flow was fine.scan showed a p0230(fuel circuit)code. replaced the batery and retested no codes.... Trouble codes: P0230 (Fuel circuit)
2006 Chevrolet Monte Carlo SS 5.3L Starting VIN: 2G1WL15C86
This car will intermittantly not start for customer. He says he heres a click, but that it doesn't turn over. I haven't been able to duplicate the problem by wiggling wires at starter, battery, or ignition switch. I replaced the battery the first time it came ...
2000 GMC K3500 Sierra SLT 5.7L erratic downshifting VIN: 1GTHK34R6Y
ok have a truck that's driving us crazy customer brought this truck in because while driving down the highway @ 55-65 mph the speedometer will drop down to like 45mph and then the transmission will shift into 2nd gear,we replaced the speed sensor with an after...
2007 Pontiac G5 GT 2.4L Misfire, MIL Lamp on VIN: 1G2AN15B97
Hi everyone. Hope you had a good Thanksgiving and are looking foward to the coming holidays ! I have this little G5 that came to me the first of Oct with a complaint of shaking real bad at times when driving on road. Someone before us was trying to fix it (sha... Trouble codes: P0204 (injector 4 circuit problem), P0300 (cylinder misfire)
2005 Saturn Ion-1 2.2L Mechanical VIN: 1G8AF52F95
Good Morning Everyone. This Saturn, 2.2L ION, towed in, turns over well, low on oil, dirty and 10 -25 lbs compression all cylinders. Removed valve cover and found timing close, ie, intake cam diamond at 2::00 position, exhaust diamond at 10:00 and #1 piston at...
2006 Saturn Ion-2 2.2L Poor Idle Quality VIN: 1G8AZ55F36
car came in shop for ck engine light on,we checked for codes p2119 throttle closed position performance went thru diagnostic procedure in mitchells replaced throttle body assembly(new) long test drive,ck engine light did not return,car ran fine except for high... Trouble codes: P2119

Fixes & Summaries for GM
Fix/Summary Answers
1998 Chevrolet C1500 Cheyenne 4.3L No Start VIN: 1GCEC19W7W
I would like to thank everyone for the help. We did fix the truck and made feel stupid but felt better when the truck started. After double checking everything 2-3 times and had someone else confirm. What we found was we had a good blue spark at the plugs a...
2005 Chevrolet Silverado 1500 4.3L 5 speed manual hard shifting into gear VIN: 1GCEC14X45
Replaced worn clutch, pilot bearing and release bearing. New slave cylinder. All is good. After I shut the truck off and it went into all gears with ease I knew what I had to do.
2005 Chevrolet Equinox LS 3.4L abs VIN: 2CNDL23F65
Hey I want to thank everyone for all the replies it was the pig tail harness on the left side repiared the the connection at hub and the coustomer is happy and said no lights since fix thanks again for all the help
2008 Chevrolet Silverado 1500 WT 4.3L tempature gauge VIN: 1GCEC19XX8
Truck is fixed! I jumped the gun on the help request because I couldn't find my way and I didn't find anything in the arkives. I disconnected the coolant temp sensor to see if there would be any effect on the coolant temp reading which of course there was (...
2004 GMC Sierra 2500 HD SLE 6.6L coolant leak VIN: 1GTHK232X4
Thanks for the replies. The #1 cylinder fills with coolant after rad repair and filling the system. It looks like head gasket is the correct answer. Many thanks! Now some questions. I'm curious about oem versus aftermarket gaskets. I'd appreciate tips from yo...
2004 Pontiac Grand Prix GT2 3.8L Starting VIN: 2G2WS52234
We didn't have access to a tech 2 so we sent the customer to a shop down the street. They said the car bumped the key out and they reset it. They are unsure why it lost programming and why it wouldn't accept new keys to be programmed
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