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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 25, 2009
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Open Help Requests for GM
Help Request Answers
1995 Buick LeSabre Custom 3.8L Starting VIN: 1GH4P52L0S
hello, here is my deal, this car came in with a no start condition so we checked for fuel and spark and it was o.k. i noticed a flashing security light then found that we had no signal at the starter, had power at the starter but no signal from the ign. switc...
2002 Buick LeSabre Limited 3.8L fuel gauge VIN: 1G4HR54KX2
This car is already fixed, but I am writing this down in gratitude for the information I found in the archives that helped me fix it, and to record some specs on this GM fuel gauge system that others may find useful. The car was towed to our shop last week for...
1990 Cadillac Fleetwood 60 Special 4.5L no blower motor opperation VIN: 1GSC65333L
this one has me worked up. vehicle came in with no blower opperation. replaced blower motor worked for about 30 sec. in vehicle then quit. checked for power to blower motor no power, has ground. reading the diagrams that i have shows ppl/wh is power from body ...
2007 Cadillac Escalade ESV 6.2L MIL Lamp on VIN: 1GYFK66817
Hey guys, We fixed this one. Came in with po 452, fuel pressure sensor low voltage. Dropped the tank and had signal, and return signal{1.4v}. Checked PCM and had no signal at pin 24,{green wire}. The "fix" was to repair the open wire near the rear of the front... Trouble codes: P0452
1985 Chevrolet K20 Scottsdale 5.7L Stall, Misfire VIN: 1GCFK29K7S
This truck will start then stall. Up to 3 times in AM (60 F this AM)Fuel psi 10 lbs, rapidly goes to 12-13. If fuel pump I could see 1 stall but 3 in succession? Intermittent long crank. Starts and runs well after it has run for a few seconds. No Codes! Someti...
1988 Chevrolet Beretta 2.8L No Start VIN: 1G1LV11W5J
happy friday! i've got this beretta here that has no inj. pulse. read all the fixes and i believe it has a fault somewhere in the DIS system or maybe ecm. the question i have is...my rpm is reading 9999 on the Modis. has anyone seen this before? KOEO , tps is ...
1997 Chevrolet K1500 Silverado 5.7L Cuts out, Misfire VIN: 1GCEK19RVE
Engine cuts out usually under load and at higher rpms, but when it is really acting bad it does it all the time. Have changed the ign module, coil, dist cap, and rotor. Last time it was in I finally got one code out of it and that was crank sensor so I changed...
1998 Chevrolet C1500 Cheyenne 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GCEC14W0W
thanks in advance . this vehicle has a constant instant miss fire .cyl # 5 is a constant miss fire on or off idle . # 6 is a slower miss fire count at idle & miss fire disappears off idle . fuel pressure is 60 psi,replaced spark plugs,ignition wires,distributo... Trouble codes: P0122, P0135, P0147, P0300
2001 Chevrolet C3500HD 6.5L fuel guage VIN: 1GBJC34111
Greetings, Where is the Fuel Balance Module and Do I Even Have One? This thing is not following the rules! MOD and IATN fix data base say the fuel balance module is on the frame, next to abs modulator, under the cab. Not on this truck. Spent 3 hours searching ...
2002 Chevrolet Astro 4.3L MIL Lamp on VIN: 1GCDM19X2B
Hello all and thanks in advance for any and all suggestions. Vehicle came in 30,000 miles ago with P1345, found distributor gear teeth all worn to a sharp edge, replaced distributor gear, reinstalled distributor and was fine for a year/28,000 miles. Came back... Trouble codes: P1345
2006 Chevrolet Monte Carlo LT 3.9L piston and cylinder heads rear bank VIN: 2G1WK15126
I HAVE A monte carlo with serious damage to all 3 pistons and cc s on the 1-3-5 bank. It looks like they were beat with a hammer. #3 intake valve seat is pushed in but valves are not harmed and not dicolored in head gasket is not blown and heads are warped .00...
1999 Oldsmobile Intrigue GL 3.5L Misfire, MIL Lamp on
This car originally came to us for an New york state inspection. the customer was upset when they found out it had failed the emissions portion due to an "illuminated" mil. WRONG, the MIL is inop. KoEo shows no activity. Cannot command it with a scanner either... Trouble codes: P0300, P0303, P0650, P0335
1994 Pontiac Firebird Trans Am 5.7L No Start VIN: 2G2FV22P3R
this bird has no injector pulse,randomly at times it will have pulse and start for a short period of time.we have replace dist,module,ecm,i have tested both high and low res signals from dist and they appear correct,the car will run off of carb cleaner and sca... Trouble codes: 18 (no crank signal)
2001 Pontiac Grand Prix GTP 3.8L abs/traction control VIN: 1G2WR12171
Hey guys..I could use your help here. Car came in with ABS and traction control light on. It set codes C0550, C0244, C0450 and P1571 on the PCM side. We are aware that C0244 and P1571 are related and have flow tested that circuit with no positive results. Torq...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Cadillac Seville STS 4.6L ign.switch VIN: 1G6KY5493W
well this caddy is down the road, thanks to kevin who reasured i was on the right track, mitchell on demand is out to lunch on this one. just remove radio & heater control assy, remove 3 7mm screws around switch assy & remove air duct behind switch assy & pull...
1990 Chevrolet Lumina 3.1L No Start, Poor Idle Quality, Cuts out, Stall VIN: 2G1WL54T5L
IATN strikes again! Turned out to be #6 injector shorted when hot. The injectors on this one are in two banks, 135 and 246. What I did was to unplug the D connector from the ECM and check resistance between pins 3 & 9 which are the drivers for the two ban...
1991 Chevrolet R2500 Suburban Silverado 7.4L tcc, o.d. VIN: 1GNGR26NXM
First thanks to all that added their input to the problem, I like many of you am not a tranny guy, so after I eliminated any external problems turned this problem back over to my tranny guy. After multiple tear downs they finally found that the valve body had ...
1997 Chevrolet Express 1500 4.3L No Start VIN: 1GCEG15W9V
I would like to thank everyone for their help. I checked for bad grounds and broken wires but I did not find any. The problem was the ECU. Water got into the ECU and damaged it. The ECU was buldging, I am assuming from the water damage. I replaced the ECU and ...
1997 Chevrolet Monte Carlo Z34 3.4L Cylinder Heads VIN: 2G1WX12X8V
Im closing this thread, I haven't fixed it yet, but I did get the heads to the machine shop and they say the heads havent been milled yet. With a straight edge I can only see that there out by about 0.06 so they should clean up fine. Just to clear up. Alot of...
2002 GMC Sierra 3500 SLT 6.6L flywheel cover VIN: 1GCJK33162
It turns out, after consulting a diesel tech at the local dealership, the lower pan must be removed first , because there are four allenhead bolts INSIDE the pan that go through the upper pan and INTO the flywheel cover, two of which have dowels. Once these fo...
2004 Pontiac Grand Prix GT1 3.8L High gear starts VIN: 2G2WS52284
After concluding that the commands were correct, the VB and solenoids were good, the unit was pulled. The inner seal on the input clutch was torn slightly, applying the 3rd clutches on takeoff until enough pressure would seal it, and the forwards would apply ...
2007 Pontiac Solstice 2.4L Misfire, MIL Lamp on VIN: 1G2MB35B47
this one goes out to bob from illinois, he hit it right on the head the upstream oxygen sensor was bad for sure. replaced sensor and reaction was almost immediate. test drove car for 15 miles and all is well. thanks for everyones help. Trouble codes: P0171, P0300.
2007 Pontiac Torrent 3.4L MIL Lamp on, COMMUNACATION VIN: 1G45L87557
this one went to the dealer they said that the radio was causing all the communication codes they put a new one in and solved the problem thanks for the help! Trouble codes: U2106 (comm tcm), U2107 (comm bcm), U0181 (comm ecm).
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