× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for February 14, 2011
International Automotive Technicians' Network (iATN) - Members Only
(Also Available: All, Asian, Chrysler, European, Ford, GM.)
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Open Help Requests for GM
Help Request Answers
1997 Buick LeSabre Limited 3.8L P/S Pump Mount VIN: 1G4HP52K7V
customer turned corner to park and heard a pop. One bolt had backed itself off p/s pump leaving the other to hold until it broke off evidently after some time from the look of it. I managed to drill out the broken bolt with a borrowed 60 degree drill. The hol...
2006 Cadillac DTS 4.6L starter VIN: 1G6KD57Y16
Starter relay does not get "start" signal from Engine control module. Using Snap-on Verus we get no antitheft system codes. When we check Body control module for a 'start' signal while cranking ignition key, the crank signal is present while reading scanner. H...
1992 Chevrolet K1500 Silverado 5.7L Poor Idle Quality, Hesitation, Stall VIN: 1GCEK14K0N
Have a good friend of mine working on this one, he owns a machine shop and had this guy bring in some motor parts for machine work. He did the work and the customer put it together themselves. When they got the thing running it ran horrible so they brought it ...
1999 Chevrolet Astro 4.3L Driveline VIN: 1GKFK16R3X
Van has intermittent driveline vibration at 60 mph. Feels like every 20-30 seconds you are hitting ruble strips on the side of road. Sometimes frequency is small, barely felt, other times whole van shakes. All u joints have been replaced 4 new tires TCC wa...
2000 Chevrolet Silverado 1500 5.3L belt noise VIN: 2GCEK19T6Y
Ok guys after this truck runs for 4-5 min. The belt starts to squeak. When first started it is quiet. The power steering pump was leaking and getting fluid on the belt. I replaced the pump and the belt also cleaned off the other pulleys. Still had the noise. I...
2003 Chevrolet Silverado 1500 4.8L MIL Lamp on, Reduced power VIN: 1GCEC19VX3
Vehicle came in with code p1515 and reduced power light on. Cleared code and test drove. Under accel about 2000 rpm engine goes into reduced power mode and you can not go over 15 mph. Checked all eight wires at throttle body by disconnecting connectors at thro... Trouble codes: P1515
2003 Chevrolet Silverado 1500 4.3L No Start VIN: 1GCEC14X93
I was just searching to find out if anyone may have ran into this. I believe it is a module concerne. Trouble codes: P1626 (pcm has not established communication with bcm)
2006 Chevrolet Trailblazer EXT LS 4.2L MIL Lamp on VIN: 1GNDT13S86
Vehicle came in for intermittent mil, found p0171 in history. check for vacuum leaks(smoke check), checked for 02 response responded quickly for forced rich(carb cleaner) test drove with fuel pressure gauge attached and found no problems. Did notice maf to be ... Trouble codes: P0171 (System lean bank)
2002 GMC Envoy SLT 4.2L Stall VIN: 1GKDT13S82
we have an 02 enyoy with an idle problem. as long as you dont turn on the heater on it will idle just fine. as soon as the heater fan is turned on [doesnt matter wich speed] the engine stahlls almost emediately. you can keep the car running by holding your foo...
2006 GMC Sierra 2500 HD SL 6.6L Poor Fuel Economy VIN: 1GTHK23D46
This is my brother's truck. he's had it 3 years now,used to do a little over 600 kilos on a tank (+-50km)for winter or city driving. Now it's 350-400km. No codes, no abnormal smoke out the tail pipe, no misfire or hesitation. Checked egr operation ,seems ok. A...
2006 GMC Yukon XL 1500 Denali 6.0L No Start, Cuts out VIN: 1GKFK66U56
Hi. I have a 2006 Yukon 6.0L problem. While driving, the truck shut off and cust stuck in left lane of hi way.Towed into shop.Once in the shop, it ran for 15 mins perfectly, and abruptly shut off.Testing and checking only saw Fuel pressure seemed low @52psi. W... Trouble codes: P0455 (Evaporative Emisson System Leak)
2007 GMC Sierra 2500 HD Classic SL 6.0L Electronic VIN: 1GTHK29K87
hello and thanks in advance for any help. i have this gmc 2500 hd truck we just put a new 6l90 trans unit from the dealer into the truck. i now have a u0101 code for high speed lan cercuit. i have checked pins at the conector per a bulltin i found all seems to...
2002 Pontiac Grand Prix GTP 3.8L MIL Lamp on VIN: 1G2WR52102
Double check egr tubes both clean into intake manifold, removed throttle plate to check orfice and was clear. Engine stumbles when egr is activated and map volts increase. Tried new egr delco and new map sensor delco / still throws code po401. Pcm calibration ... Trouble codes: P0401
2007 Pontiac Montana SV6 3.9L Battery VIN: 1GMDV03157
Vehicle came into shop with supposed dead battery. We got into it and started it. The history is that when the van sits for two or more days the battery will go dead. If jump started van will start all the time until it sits. It has only happened once to us. W...
2007 Pontiac G5 2.2L high idle VIN: 1G2AL15F07
Have this vehicle here that acting odd. Came in with a p0121. Checked MAP, both pedal sensors, both TPS sensors, both temp sensors. All show good. Cleaned the throttle body and cleared codes. Made sure the throttle plate is not sticking. Now... The vehicle w...
2001 Saturn L300 3.0L Poor Idle Quality, Hesitation, Stall, Misfire, MIL Lamp on VIN: 1G8JW54R91
Scrapper car has an intermitent loss of power, also pops threw intake when this happens. Installed a new bank 2 converter because of Genisys bogus readings. Customer states that car will lose power, and backfire, he shuts car off and restarts and it will run f... Trouble codes: P0102, P0172, P0175

Fixes & Summaries for GM
Fix/Summary Answers
1991 Buick Regal Custom 3.1L Poor Idle Quality, Hesitation, Cuts out, Stall VIN: 1G4WB14T8M
Thank you all who have responded. All of the replies were helpful. The car runs beautiful. I pulled the upper plenum and started to test the injectors that I couldn't get to before. Low and behold, I found a injector with a resistance of 1.5ohms. 3 injectors t...
2004 Buick LeSabre Limited 3.8L Turn signals VIN: 1G4HP54KX4
First... a heart felt "THANK YOU" to everyone that took the time to reply to this request. Gary was the winning ticket with his delivery of a wiring diagram. Following the diagram I was able to find a broken pin in the C200 (B5) connector. I am still at a loss...
1993 Cadillac DeVille 4.9L security VIN: 1G6CD53B6P
turned out it was the module it self as i mentioned in my orig. post I had already bypassed the key with a resistor i opened the module and it had a burned circuit,put in new module and fired right up
2003 Chevrolet Cavalier 2.2L steering gear VIN: 124J568F03
flushed ps system and added lucas and mama is happy so i am happy no shudder
2004 Chevrolet Impala 3.8L Heater Hose Fitting VIN: 2G1WF55K84
Thanks for all the replys. I found a dealer 'out of state' that was willing to take the time to help find the correct parts. Why the ones in my area would not/could not help & take my money is beyond me. Seems like if the order is under $100 they don't want to...
2007 Chevrolet Express 2500 4.8L Brakes VIN: 1GCGG25V97
Ok Guys Thanks for all the Support It was the Right Rear caliper slide pin froze up solid Replace Bracket, pins,Pads and rotors Pedal came back and is good Thanks again for makeing me take a better look for binding !
2004 GMC Envoy XL SLT 4.2L Air bag light on VIN: 1GKET16S84
1998 Pontiac Grand Prix GTP 3.8L Transmission VIN: 1G2WP5210W
It looks like the replies are overwhelmingly "No". After inspecting i have found no modulator on either vehicle leading me to believe i was incorrect about the Intrigue having a 4T60E trans. I had forgotten about the performance shift in the Pontiac, so it loo...
2002 Pontiac Montana 3.4L Cooling Systems VIN: 1GMDX03E62
Want to thank all the people who posted replies.The majority of responses were correct,in that the head gaskets were gone.When we first checked for leaks there was no evidence at all.What we did was to warm the engine up and then pump pressure in the cooling s...
2004 Saturn Vue 3.5L 25-30 mph VIN: 5GZCZ63444
Customer cannot afford a transmission teardown inspection at this time. Will bring back at a future date when $$$ is available. Thanks everyone for your help.
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next