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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for March 6, 2009
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Open Help Requests for GM
Help Request Answers
1968 Buick WILDCAT 430CID fuel gauge VIN: 4GG678C108
replaced fuel tank sending unit with swing arm type sender from gm obsolete part the original was a cylinder type sender with float inside a tube!. custumer complant is that the gauge swings radically from empty to full when turning or stopping. gm obsolete sa...
1999 Cadillac Catera 3.0L Misfire VIN: W06VR52R1X
1999 Cadillac Catera lean misfire when cold This started just after replacing the transmission. The car ran rind prior to the trans R&R. Now when started cold, the engine idles high, tries to stall and has a lean misfire as if there is an unmetered air leak. I...
2003 Cadillac CTS 3.2L prnd32 led VIN: 1G6DM57N03
Can anyone help with correct voltage for Park/neutral signal circuit and/or location AT shift indicator module? Transmission is working correctly now.
1991 Chevrolet V3500 Silverado 6.2L trans VIN: 1GCHV33N3M
Hi everyone.I need help with this beast again.I have one problem left with this transmission.It slips in 1st gear when pulling out onto the street from work-once the speed is fast enough it shifts to second and all is well.Code 85 sets and will remain until ne...
1995 Chevrolet C2500 Cheyenne 5.7L pedal on floor with good booster VIN: 1GCGC29K6S
I have a 1995 chevy c2500p/u that came in to the shop for a brake problem upon diagnosis found that it had a leaking wheel cylinder at this time the front resovor of the master cylinder was dry so i knew i was going to have fun bleeding the abs i replaced all ...
1997 Chevrolet Lumina 3.1L battery VIN: 2G1WL52M9V
Help! Guys this ones driving us crazy, intermittent drain on battery, fuse #10 is affected circuit which shows seatbelt/ign key/lamps, alarm, theft deterrent system,radio, DLC, electonic brake module. Test light in series on battery shows intermittent flash(co...
2000 Chevrolet Lumina 3.1L smell VIN: 2G1WL52J1Y
Customer is complaining of intermittent fuel smell. The night before they brought it in they had to open the windows in their garage because it was stinking up the house. There are no visible leaks that we can find. The smell seems to be coming from the engine...
2002 Chevrolet Astro 4.3L rear defogger VIN: 1GNDM19X18
this astro van has an electrical rear defogger thats inop. 40 amp fuse in under hood relay box is good. 30 amp under dash fuse is cold no voltage. if I apply voltage to the 30 fuse under the dash the defogger switch light in the hvac control head will light up...
2004 Chevrolet Trailblazer EXT LS 4.2L Mechanical VIN: 1GNES16S34
Truck has a vibration when engine is at idle. Seems to get better when fan clutch is removed. Tried a new fan clutch, replaced water pump because of a slight wobble. Problem is still there. Has anyone had problems with this?
2005 Chevrolet Malibu LS 3.5L Rotor VIN: 1G1ZT52895
This V6 Malibu has the 4-Cylinder front brake system. The pads don't wear excessively, and there are no signs of abuse or overheating. This is a mountain community, with very steep hills and long grades. Many vehicles with small brake components for their weig...
2006 Chevrolet Monte Carlo LT 3.9L traction con VIN: 2G1WK15196
code co561,which is a symptom code,using tech 2 cant find any other modules with any codes. i have replace brake module,made no difference.traction light stays on as soon as key is turned on,pushing traction button it displays traction off.thanks for any ideas
1996 GMC W4 5.7L wont shut off VIN: 4KDB4B1R1T
i have a 1996 gmc/isuzu w4 truck with a 5.7 engine. the truck will start but it wont shut off unless you turn on thre headlights,wipers, or if you pull the 15amp ignition(engine fuse) it seems like it has a short to power or a bad ground. i just dont have any ...
2004 GMC Sierra 1500 SLE 4.8L Electronic brake controler VIN: 1GTEK19VX4
Hey guys thanks in advance is there anyone out here in IATN LAND that can help with this we have no power from the pig tailunder the dash or to the controler or out to the rear of the truck is there a wire that needs to be hooked up or jumpered to get the cont...
2005 GMC Sierra 1500 SLE 5.3L Cooling Systems VIN: 2GTEK13T85
This truck has a small coolant loss over time. Loses about 2-3 litres in 2 mths. I have pressure tested cooling system and pressure does hold for at least 1/2 hour. I also added leak dye and had customer return in a week but I have absolutely no sign of coolan...
1999 Oldsmobile Alero GLS 3.4L Poor Idle Quality, Stall VIN: 1G3NF12E5X
we replaced head gaskets on this vehicle, and had the heads checked, heads checked out good. after the repairs, engine will idle for about 1-2 mins.good, and than develope a idle surge, and stall out this car came in running real rough due to the head gasket l...
1998 Pontiac Bonneville SE 3.8L oil pressure VIN: 1G2HX52K2W
This car came in with an engine noise after long cruise. I put the mechanical gauge on it and the pressure is bouncing constantly and get noisey at idle and off idle. Has anyone seen bad oil pumps or loose pick up tubes on these engines or lower end issue that...
1999 Saturn SC2 1.9L No Start, Poor Idle Quality, Hesitation, Stall VIN: 1G8ZH1278X
Customer came in complaining after car sat over night and went to go start in morning the car would have a hard time starting. Comfirmed customer complaint that after a cold soak the car would have a extended crank, would spit and sputter, to get started somet...

Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet C1500 Cheyenne 5.7L No Start VIN: 2GCEC19K0R
1997 Chevrolet Astro 4.3L oil pressure gauge VIN: 1GNEL19W7V
Thanks to all of you that replied to ou help request. Everyone seemed so sure it was the sending unit even though our test results with a mechanical gauge seemed to indicate the dash gauge was reading accuratly. We reviewed our tests and rechecked with mechani...
2004 Chevrolet Epica LS 2.5L Hight beam VIN: KL1VM52L34
Thanks for the help with this problem and to Don from BC who said the Canadian Epica is a Suzuki Veron. Alldata had the wiring diagram for this car. The headlight relay was not receiving the ground signal from the headlight switch. Suzuki had a TSB for these c...
1995 Geo Prizm LSi 1.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall VIN: 1Y1SK5284S
Thanks for all the replies. Car turned out to have mutiple problems. the sig return wire from tps to pcm was open most of the time. and turns out that map was intermentent only working sometimes. replaced map and car now runs like a champ all's well now and cu...
2003 GMC Savana 1500 5.3L odominator VIN: 1GDFH15T23
replace speedo,cluster and reflashed w/ecm for correct milage on van to new cluster... expensive fix..
2004 GMC Sierra 3500 SLE 6.6L Hesitation, Surge VIN: 1GTJK33254
Thanks Gentleman I put in the fuel filter and the primer pump and sent the guy on his way. He called back a day later and feels it is repaired. Thanks a million Trouble codes: P1093 (fuel pressure low during power enrichment current code), P1093 (fuel pressure low during power enrichment current code), P0045 (Boost control solinoid circuit in history code), P1621 (PCM eprom memory performance in history code).
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