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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for October 22, 2009
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Open Help Requests for GM
Help Request Answers
1990 Buick Regal Custom 3.1L No Start, Stall VIN: 2G4WD14T7L
this car when hot, soon as you give it throttle it stalls and sometimes it is hard starting, cold it runs fine let it sit fires right up. I scoped the ckp sensor and saw glitches so i changed it no change and still have glitches.i also scoped the icm no glitch...
1995 Chevrolet Corsica 2.2L Excessive Emissions, MIL Lamp on, VIN: 1G1LD5542S
Ok this thing has me going around in a circle. Car came wouldnt accelerate over 2k rpms most of the time. visual inspection of the plugs came up with cylinder # 1 very fuel fouled, the rest lean. chased it back to the 1-4 coil pack being cracked around the bas... Trouble codes: 45 (Exhaust Rich)
1997 Chevrolet Malibu 2.4L timing chain VIN: 1G1ND52T7V
Vehicle returned, would start but could not run well enough to drive, a lot of noise from timing chain area. Upon tear down found, found chain sloppy opposite side of tensioner and appears to have jumped. after inspecting all the components we had replaced I a...
1999 Chevrolet C2500 5.7L Hesitation VIN: IGBGC24R8X
Well after 25 years turning wrenches I still get one or two a year that stump me. This 1999 Chevy with the old style poppet valves has me stumped. 1st, the vehicle comes in hesitating and giving one pop through the intake when giving the gas hard on initial ta...
2000 Chevrolet Astro 4.3L hvac VIN: 1GNDM19W5Y
I'm pulling my hair out on this one. Thanks in advance for you help. Customers complaint is insufficiant heat. I found a broken vaccume line going to the heater bypass valve and replaced it (although i think that by default the heater bypass valve is on heat...
2003 Chevrolet Suburban 1500 LS 5.3L Rear vertical motor VIN: 3GNFK16Z23
Driver seat is not functioned at all, 30 Amp CB is good, checked and replaced the control module under the seat. Now, the rear vertical motor has no power to it when depressing the switch. After chasing my tail and put the vehicle on the back burner for 30 min...
2004 Chevrolet Tahoe Z71 5.3L Rear heat VIN: 1GNEK13T84
Have a 2004 chevy tahoe that came in with no rear heat. We found with the help of Iatn that the vehicle will need the rear blend door acutator replaced. My question is, that once we get the new part in, will it need to be reprogramed by the dealer in order to ...
2005 Chevrolet Silverado 2500 HD LS 6.6L cooling VIN: 1GCHC23225
This truck has a problem building pressure in the cooling system. doesn't overheat, but it sure has alot of presure in the system. the upper readiator hose is very hard, abnormally hard. the cap keeps relieving the pressure. I believe this is a 16 Lbs. system,...
2005 Chevrolet Corvette 6.0L MIL Lamp on, reduced power VIN: 1G1YY24U45
Recurring intermittent p2135 and reduced power warning message. Have checked harness ohms/volts pulled terminals to check crimps, freeze frame data showing 2-5%diffewrance between tps1 and tps2 percentages. any info /help would be appreciated thanks in advance... Trouble codes: P2135
1999 GMC Savana 2500 5.7L Misfire VIN: 1GTFG25R6X
Van came in with a misfire at idle. Scanner (S.O. Solus) showing #5 cyl missing. Had original ignition parts so we installed cap,rotor,wires and plugs (all delco) After 10 mile drive van developed miss at idle that would continue when accelerating. Now setting... Trouble codes: P0171, P0174
1999 Oldsmobile Bravada 4.3L heater VIN: 2B4GP44321
this truck has automatic temp control, the problem is when turning the heater control to hot the blower blows full hot like it is supposed to, if you turn the control to mid position the temp is very erratic, it may go to full cold or stay at full hot. i have ...
2002 Pontiac Sunfire SE 2.2L PCV System VIN: 1G2JB52422
Does anyone know a good way to test if pcv system is working. Does not have a pcv valve, another post said it has a fixed orfice/baffle inside the valve cover. Their is a fresh air intake hose on top of valve cover. Where does the vacumn come from and how do t...
2002 Pontiac Grand Am SE 2.2L Turn Signal VIN: 1G2NF52F12
Fellow Techs, thank you for any advice. First vehicle came in w/o to replace multi switch. Came back couple days later complaining the problem still there.. Now the service advisor tells me the whole story. Complaint. When signalling Right the right front tur...

Fixes & Summaries for GM
Fix/Summary Answers
1993 Chevrolet C1500 Silverado 4.3L No Start, Poor Idle Quality, Cuts out, Stall VIN: 1GCDC14Z9P
I really appreciate the way all of you jumped up and tried to help with this problem. Several of you suggested fuel as the trouble, as was my first gut instinct. I had my tech run some fuel out in a container for me so I could check the quality. While he was d...
1997 Chevrolet K3500 Silverado 7.4L all systems VIN: 1GCHK34XVZ
Thanks for all the input. Since this make/model doesn't have a history of car fires and the fire investigator did not find any cause other than "electrical - steering column" we do not know the exact cause. But thanks for the input anyhow as it helped to det...
1998 Chevrolet K1500 Silverado 5.7L Unknown VIN: 1GCEK19R1X
hey everyone we got the truck running better than new it turned out to be the distributor gear was worn more than it was supose to be we ended up puting a hole new distr in thank you all for the overwelming support by dad kepton saying that cant be it so i sea...
1999 Chevrolet Tahoe 5.7L Reverse 2/3 Flare VIN: 1GNEC13R1X
Upon tear down, found the convertor to input drum thrust baring lost the roller needles. This took out the input drum and the reverse input drum and clutches. Went ahead and did a rebuild, to include the new sun shell and convertor. Thanks for the replies, exc...
2001 Chevrolet S10 4.3L Surge, Cuts out, MIL Lamp on VIN: 1GCCS19W11
ITS FIXED!!! Thanks to everyone who responded. Seems there was some confusion on my posting of O2 readings.When I said that one side was reading 0mv and the other side reading 8 to 10mv I meant 8 to 10...(almost zero)not 800 to 1000mv...probably should have ... Trouble codes: P0131 (H2O Sensor low voltage B1S1), P0151 (H2O Sensor low voltage B2S1), P0300 (Random engine misfire).
2001 Chevrolet Silverado 3500 6.6L Surge, LOSS OF POWER VIN: 1GCJK33121
Well guys, I preformed all the recommended checks and repairs suggested. I had no resolution of the problem. We are not a Diesel shop and we were forced to recommend customer to a shop more familiar and experienced with this model vehicle. thank you all for th... Trouble codes: P0093 (large fuel leak).
2003 Chevrolet Impala 3.8L compressor VIN: 2G1WF55K13
Hey thanks for all of the replies you guys are great well we found out we were using the wrong oil this compressor takes pag 46 not pag 150 i wound up putting a ac manifold line assy on with a new compressor and o tube and accumulator and completly flushed the...
2005 Chevrolet Impala LS 3.8L abs VIN: 2G1WF52E85
Thanks to all who replied. It took some time but we tracked it down to the wiring going to the right front wheel bearing. All was well for a few days then customer called and said abs light returned! Upon scanning for codes and data found the right front wheel...
2002 Pontiac Bonneville SE 3.8L temp control actuator VIN: 1G2HX54K72
Thank you for the replies. I had this fixed while I was posting the problem. After examining the old v new actuator (the pins in the connector were different) we discovered our vendor sent the wrong actuator. Installing the new actuator fixed it. p.s. You ca...
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