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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for April 23, 2014
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Open Help Requests for GM
Help Request Answers
2002 Buick LeSabre Limited 3.8L No Start VIN: 1G4HR54K42
After repairs, vehicle will not start. Holding throttle at 100% allows engine to start, but very poorly. Sputters and bucks as well, and almost immediately stalls. Sounds like ignition wires were crossed, but have verified proper orientation via information on...
2008 Buick Enclave CXL 3.6L voice audio VIN: 5GAEV23718
OK... We are dealing with a strange symptom with no direction??? Fully functioning Radio, CD player, DVD player, speakers, video screen, rear controls, etc... Problem is when the "movie" finally begins.. there is no voice audio!! Music soundtrack and sound ef...
1996 Cadillac DeVille 4.6L MIL Lamp on, P0153 VIN: 1G6KD52Y2T
Bank 2 runs lean predominately at idle, but is still leaner than bank 1 at higher rpms. Car idles smooth and runs well under all power requests. Symptom is indicative of vacuum leak , however multiple smoke tests have not revealed any leaks. Maf has been swapp... Trouble codes: P0153 (Oxygen sensor slow response bank 2 sensor 1)
1996 Chevrolet Blazer 4.3L Ignition and Fuel Pump operation VIN: 1GNDT13W9T
Hello - Good Morning, Thank you for your help. ***. Guys, this is an old age unit - a 96 model Baby Blazer with the 4.3L 4x4 power plant. We detached the positive battery cable - first. We resealed the intake manifold - upper and lower. We renewed the oil p...
2004 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK231X4
Changed all glow plugs with o.e. Parts, code reoccured after approx 3 starts. Checked for output to the glow plugs,no voltage. Had b+ and ground at the glow plug module. Replaced module, cleared code, 3 starts later, code reoccured. This time i have voltage at... Trouble codes: P0380 (Glow plug heater circuit problem)
2006 Chevrolet Express 3500 LT 6.0L fuel guage VIN: 1GAHG39U96
Fuel guage reads empty and fuel light is on. Replaced the fuel pump assembly. Had assembly out and plugged up. Moved lever and it worked. Put it back in car and it does not work.
2007 Chevrolet Malibu Maxx LT 3.5L 1-2 VIN: 1G1ZT68N57
No Codes present. Car has second gear start, all solenoids appear to function and have proper resistance. Noticed that when in drive and brake on, first gear is commanded (1-2 solenoid on, 2-3 is off) as soon as wheels start to turn the second gear is commande...
2009 Chevrolet HHR LS 2.2L Compressor VIN: 3GNCA13B09
Vehicle cools great when started, but after driving blows non-conditioned air. Compressor still operates. High and low side lines are the same temperature to touch when not cooling and high hot and low cold when working. Installed ac delco expansion valve with...
2004 GMC Sierra 1500 SLE 5.3L Vacuum assist VIN: 2GTEK19T64
Customer complaint is an intermittent hard brake pedal when applied. Vacuum brake booster has the "Supplemental Brake Assist" vacuum pump at booster. No warning messages such as "Reduced Brake Power," "Service Brake Booster" or "ABS" are being displayed. No co...
2002 Pontiac Grand Prix SE 3.1L Temp Guage VIN: 1G2WK52JX2
We received a car from a customer whom let another person repair her temp guage that was stating car was hot, reading 260, when in reality it was 190 degrees. This person took and removed the ect and discarded, ran a mechanical guage to that port and then dril...

Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac Catera 3.0L Poor Idle Quality, Cuts out, Stall, Misfire VIN: W06VR54R7Y
ok removed #6 spark plug and found bent electrode. replaced pluga nd reinstalled coil pack. misfire no longer evident but irratic idle. checked connector at electronic throttle body if wiggle it idle becomes smooth. recommended tb and connector. Trouble codes: P0302, P0304, P0306, P0100.
1998 Chevrolet Monte Carlo Z34 3.8L Hesitation, Misfire, MIL Lamp on VIN: 2G1WX12K1W
First thing that was wrong the dorman intake was leaking from the inside intake runners the plasic mold was hitting the alt ang keeping the manifold kicked to the far side and the second problem was the o2 reporting lean hitt it with propane no change. Thanks ...
2011 Chevrolet Silverado 1500 LT 5.3L Trailer brake VIN: 1GCRKSE31B
The issue turned out to be a bad connection at the dash switch. The wires dragging on the ground were from an accessory which the customer removed which appeared to be OE sending me down the wrong path. Thanks to all the techs who helped. CHEEERS!!!
2004 GMC Yukon SLE 5.3L abs VIN: 1GKEK13Z44
After some exhaustive Googling I finally found what I needed, here it is: Looking at the ABS unit facing the ports, Starting from the left: TOP ROW: Left front; Right Front; Left Rear; Right Rear Second Row: Front Master cylinder; Rear Master cylinder The ...
2006 GMC Sierra 2500 HD SLT 6.0L No Start, Stall VIN: 1GTHK29U86
Two Words. RATS NEST That's why I could not communicate with ECM and why would run on starting fluid. I knew that it was something weird about what was going on with this truck. I just didn't have the time to take on this job that's why we sent it to dealer.
1990 Oldsmobile Cutlass Ciera 3.3L Poor Idle Quality, Hesitation, Surge, Stall VIN: 1G3AJ54NXL
Took all the info and went to work. After replacing the bad parts as stated in my update the car actually idled but it still had a lean condition. I rechecked the injectors for correct ohms that Kim & Avinash stated which all tested at 12.3. Thanks for that in... Trouble codes: 34 (MAF Circuit).
2003 Saturn L200 2.2L No/low heat VIN: 1G8JU54F13
Thanks all and especially Eddie! I made a careless error-this car has a cable that controls the blend door and I was thinking actuator. The controller was broken at the point of cable attachment only allowing limited movement. Thanks again,Greg
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