× 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 November 20, 2007
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
2003 Buick Century Custom 3.1L MIL Lamp on VIN: 2G4WS52J43
Came in for inspection, light on. Cleared code, retested and failed. EGR valve operates when power applied, reads position sensor when energized manually. Will not open when commanded by MODIS, I get power but no ground to operate valve. Also MODIS shows no EG... Trouble codes: 0403 (EGR circuit malfunction)
1993 Cadillac DeVille 4.9L ride control VIN: 1G6CD53B3P
This customer 1993 caddy has electronic ft struts. do to the cost he would line to put on reg struts and mounts If we do this is he going to have a message about ride control on all the time? will it affect anything on the rear? Thanks for any advice Jim
1995 Chevrolet Tahoe LS 5.7L Hesitation, Cuts out, Misfire VIN: 1GNEK13K1S
Problem: Cuts out on medium to heavy load, has new cap rotor,wires,plugs,module and pick-up coil.Compresssion 140 -150 on all cyls. Scan'd - no codes, Check"d fuel pressure - 28 pounds, check'd for resriction's in lines and t-body none!. Tried new fuel pressur...
1997 Chevrolet K1500 Cheyenne 5.7L abs VIN: 2GCEK19R4V
When coming to a stop the ABS kicks in. Has new pads, rotors and sensors with clean mounting surface. ABS ring looks good with no damage. Tires good with proper air pres.
1999 Chevrolet Lumina 3.1L MIL Lamp on VIN: 2G1WL52M3X
Please help me out here, this Lumina doesn't have any driveability issue other than the check engine light is on. the only code is the p0401 for insufficient egr flow. I can command the egr on with my scanner and the map voltage increases like it is supposed t... Trouble codes: P0401 (egr insufficient flow detected)
2000 Chevrolet Blazer LS 4.3L Transfer case VIN: 1GNDT13W6Y
Customer complaint of the service four wheel drive light coming on intermittently. Scan Test: History codes C0305 Motor circuit A/B circuit error & CO315 Motor ground circuit. Roadtest 10 miles in & out of four wheel drive serveral times attempting to duplicat...
2003 Chevrolet Silverado 2500 HD 6.6L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1GCHK23113
GUYS I need some info an derection here. This 6.6 has codes p0087/p0089/p1093. An runs very poor 40 mph tops. I checked the fuel press at test port 2 psi vac. I have a tech2 scanner an reading the actual fuel rail press. koeo is 203.3 desired fuel rail press. ... Trouble codes: P0087 (P0087 for fuel rail pressure too low.), P0089 (The difference between actual and desired FRP is more than 20 MPa), P1093 (The difference between commanded fuel pressure and actual fuel pressure is more than 20 MPa.)
2004 Chevrolet Aveo LS 1.6L suspension VIN: KL1TJ62654
Customer came in with complaint of noise in front suspension. Checked tsb on Mitchell for stabilizer bushings. Replaced bushings. Noise is still there.If you go over bumps it makes a loud noise. Installed Snap on noise locater and it seams to be coming out of ...
1999 Pontiac Grand Prix GT 3.8L No Start VIN: 1G2WP52K6X
i have this grand prix giving me fits.it is a no start,no spark,no injector pulse.has good fuel pressure.i checked crank sensor. i have 3x signal,but no 18x signal.checked power and ground to crank sensor.i have 10.7 volts to sensor.i replaced sensor still no ...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Buick LeSabre Custom 3.8L control head VIN: 1G4HP52L8R
Thank You to all who offered help. We finally located a used control head at a Bone Yard. We put it in and the car is fixed. Cost us $100.
1993 Cadillac Eldorado Sport 4.6L No Start VIN: 1G6EL12Y6P
Thanks so much to Jose [...] all hit it on the nose. There was a kinked return line close the the shift linkage on trans. The caddy was fixed in 30 min. after reading replies. fuel pressure dropped to 38 immedeatly. Thanks so much iatn rocks...
1998 Cadillac DeVille 4.6L hard start VIN: 1G6KD54Y4W
Thanks to everyone for all the help! almost everyone was right on with the fuel pressure regulator causing the long crank time and black smoke problem. I also have a 97 seville of my own so i replaced the regulator on that too right away. The EXP ID problem st...
1999 Cadillac Seville SLS 4.6L abs light on VIN: 1G6KY5499Y
To all the guys that helped us thank you ALFRED [...] and the many more we had great input and this is a true reminder of how good this network is to us an the talent there is in the auto repair field ..we truly ...
1996 Chevrolet C2500 Cheyenne 6.5L No Start, Cuts out, Stall VIN: 1GCGC29F6T
From what I have found the PMD will shut the truck off hot. There is also a position sensor in the injection pump that will cause a no start. Unfortunately there isn't really a conclusive test for either of these. I did find out that is the truck is running...
1996 Chevrolet K2500 Suburban LS 7.4L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 3GNGK26J4T
thanks to all who replied. I replaced the dist. with an AC Delco and no change. ,tore down ft cover and inspected, it looked fine,very clean,little slack in the chain..the cam retainer looked great.put it all back together and it did not start.no rpm on the s... Trouble codes: P0340, P0341.
1998 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GCDM19WXW
Hey everyone. sorry it took a while to post fix but this one is fixed and it taught me and my tech when all else fails go back to basics! I will give a brief summary of all the replies that I have received (by the way: thank all of you so much!). I had someon... Trouble codes: P0300.
2000 Chevrolet Silverado 1500 5.3L Air Bag VIN: 2GCEC19T5Y
Thanks for all the replies. Most said had to go to dealer. Thats what my customer (body shop) decided to do. It worked, and the truck went home. Thought about trying the 30 minute re-learn, even though the "book" said not to, but didn't feel brave enough to tr...
2004 Chevrolet Express 1500 4.3L hard start VIN: 1GCFG15X54
thanks to all sorry it took so long to respond but i've been waiting to hear from customer and it's good news after the responses i received i removed the purge solenoid and it was stuck open so when youd fill thr tank full the vapersa were filling intake caus... Trouble codes: P0442, P0496.
1998 GMC Yukon SLE 5.7L carrier VIN: 1GNFK16T51
OK, I ended up just tapping the shims in. The stock ones were definitely still too thick but I had a shim kit so I found some that would allow for an acceptable amount of pre-load (using as much as I could get in without damaging them). I used a block of [...] ...
2000 GMC Sierra 2500 SL 6.0L door locks VIN: 1GTGC29U3Y
well this was easier than i thought the auto door lock can be dissabled, thanks to randal here how.The DRL relay is under the hood in the distribution box and the door locks can be canceled with this procedure...With the ignition off, pull back and hold the t...
1994 Oldsmobile Achieva S 2.3L timing cover oil leak VIN: 1G3NL1537R
The breather system hoses were soft but were not the cause of the problem. Locating what was the true leak led to the fix. Please do not laugh but the oil leak source was the front crank seal. The crank balancer is very open and can be looked through while th...
1996 Pontiac Grand Prix SE 3.1L No Start, MIL Lamp on VIN: 1G2WJ12M8T
Hi This turned out to be an aftermarket security system causing all these problems. We by passed the system and everything seems to be fine. Thank you for all the responses. Jim Trouble codes: P1629 (Theft deterrent cranking signal), P1672 (Low engine oil level lamp control circuit).
1996 Pontiac Sunfire SE 2.2L cranks wont fire VIN: 1G2JB1247T
1999 Pontiac Grand Prix SE 3.8L Poor Idle Quality, Stall VIN: 1GFJUW5678
well finally got this car to act up it was the mass air meter it was all over the board even tapped on it and it got worse also had a leaking fuel pressure regulator too. car runs great thanks for the replies.
2002 Pontiac Grand Am SE1 2.2L No Start VIN: 1G2NF52FX2
Many have nailed this, some others gave some ok advice and some not even related advice. Those who all mentioned ignition switch were right on. I was looking for the common wiring between all the fuses that were at 6 volts. And it was all on the pink wire fro...
2002 Saturn SL2 1.9L Cuts out VIN: 1G82H52852
we had the car act up on us at the time we had a fuel pump gauge on it and found that the the fuel pump lost fuel pressure. Checked all connections and lines amp draw and voltage drop. Found that the fuel pump when of line,Replace fuel pump so far so go thanks...
Prev (Also Available: All, Asian, Chrysler, European, Ford, GM.) Next