General Motors Company, commonly known as GM, is an American multinational corporation headquartered in Detroit, Michigan, that designs, manufactures, markets and distributes vehicles and vehicle parts and sells financial services. General Motors produces vehicles in 37 countries under thirteen ...

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Failure in A/C compressor due to flood?

I've changed my car (Brazilian GM Classic) oil and after the change the A/C stoped working. I've asked for the car dealearship I've changed the oil to check it up. The diagnostic was that the A/C ...
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1answer
63 views

What action to take when GM Goodwrench breaks something? [closed]

I'm just back from GM Goodwrench for an airbag recall. The part in question is as you see in the picture. It looks like a fresh break, and the repair required pealing the carpet partly back, but I ...
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3answers
312 views

Why does GM still insist on push rod engines?

GM continues to design and produce push rod (Over Head Valve or OHV) engines while most of their competitors have gone to over head cam (OHC) configurations for their performance engines. Is there a ...
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0answers
30 views

GM 4L60-E Rebuild Questions - Part 1

I am in the process of rebuilding my first 4L60-E (I've done a 4L30-E before) and I had a couple questions. 1st: In terms of the input drum pistons I know there are both aluminum and steel models, ...
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1answer
27 views

Transfer Case Options 4l60e

I am currently in the process of rebuilding a 4l60e which will go into a 4x4 go-kart. I am now in need of a transfer case that will bolt up. Are there any manually shifted (not dash button) transfer ...
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0answers
40 views

Why would headlights stop working after turning over

I have a 2006 Pontiac G6. When I walk up to the vehicle and unlock it, the headlights turn on. After I get into the vehicle and turn it over, I cannot turn the headlights back on. Fog beams and turn ...
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1answer
65 views

Magnetic Active Suspension or Magnetorheological Damper

GM developed magnetic dampers for the Corvette several years back. What is magnetic active suspension and how does it work? I understand there is a magnetic fluid in the shocks but how, deep down, ...
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1answer
45 views

What is the drive cycle for OBD-II equipped GM vehicles?

As the title states, what do I have to do to get through the drive cycle for OBD-II equipped GM vehicles?
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2answers
1k views

Live scan tool for OBD 1.5 GM transitional?

1995 S-10 Blazer 4.3L Vortec V6 (vin W) with Powertrain Control Module (PCM) 1995 was the OBD transitional year for GM. The PCM itself is OBDI, but the interface connector has the 16-pin D-style ...
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1answer
130 views

2006 Solstice - car won't turn over following engine replacement

I recently installed an engine (complete from oil pan to the valve cover) from a 2010 Malibu in my 2006 Solstice. (Replacing a blown engine.) The car will not crank / turn over. Symptoms include: ...
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1answer
2k views

What is Opel/Vauxhall's TwinPort Technology?

Some Opel Engines come with something called TwinPort Technology. I guess that this increases power, as the original Z12XE (1.2) engine has 55kW, and the TwinPort (Z12XEP) version engine has 59kW of ...
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2answers
62 views

New breaker points not working

I'm trying to replace the breaker point on my 1980 Oldsmobile, trying to fix some spurious misfires and engine stalls. The car was converted to gasoline in the early nineties or late eighties, engine ...
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1answer
33 views

Will anti-Freeze leave behind residue?

I bought a used 93 3.1 GM long block engine with 19,633 miles in 2014 from a yard that I found on the internet. The engine was pulled in 1996 and stored by the yard. I did a title search/check to ...
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1answer
3k views

Repair or replace frayed fuel injection wiring harness?

This is on a 2008 Chevy Impala, 3.5L V6, non-flexfuel. Recently got cylinder 1 misfire / ignition failure codes. An investigation revealed that mice had gotten into my garage, made themselves at ...
2
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1answer
358 views

2002 Impala 3.8L V6 thermostat gauge starts below cold then creeps toward red

My 2002 Impala 3.8 has been running great. However, this summer the thermostat gauge stopped reading temperature right. To the point it wouldn't move even after it had been running for hours. It would ...
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3answers
68 views

Noisy stereo when engine running

I have a 2009 Holden Barina. I turned the car on to "Accessories" and the radio was working fine. I turned the car on, and now there is a noise coming from the speakers and no music. The same thing ...
2
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3answers
666 views

How to tell if an 08 CTS has a limited-slip differential?

I'm looking at purchasing a 2008 CTS RWD. From what I could gather from various forums, it sounds like a limited-slip was only included if you purchased the "summer performance tires" package. I ...
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2answers
36k views

Low beam headlights out, High beam working

The patient is a 1996 Chevrolet Caprice with dual-filament bulbs. Both filaments in both bulbs light up in high beam mode, but no filament on either bulb lights up in low beam mode. What could be ...
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1answer
7k views

Can I use an OBD2 Scan Tool on older GM vehicle?

I can get an adapter that connects my OBD2 scan tool to my 12 pin GM scan tool connection. But will the tool be able to read the codes and tell me anything useful? Or do I need to get a scan tool that ...
5
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1answer
17k views

Which Reluctor Wheel on LS Engines?

Around 2005 or 2006, GM started using a 58-tooth reluctor wheel, where before they used a 24-tooth wheel in the LSx based engines (LS1, LS2, LS3, etc.). This wheel is used as a way for the computer to ...
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2answers
82 views

2003 Chevy Corvette actual mileage

A decade ago, a friend showed me how if one shuts down the electrical features of the dash of a 2003 Chevy Corvette, by removing a specific fuse, the car is drivable but the odometer no longer records ...
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4answers
1k views

Knocking in my engine during cold start / whistling when accelerating

My 2003 Pontiac Grand Am GT will spudder and the engine will shake occasionally on cold starts. Its not a consistent problem - not every time, but it seems to be growing worse. I can feel the engine ...
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2answers
1k views

Why did GM change the pressure rating of their coolant tank cap for existing vehicles?

GM has changed the part number for the radiator surge tank cap on vehicles that came from the factory with Dex-Cool. The new cap is 18 PSI (RC87 - part number 25713160), the old one for many vehicles ...