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How to test a GMC ignition control module?

How to test a GMC ignition control module? NOTE: Testing the ignition system is a breeze. This tutorial will help you test the ignition coil, ignition module, and the crankshaft position sensor: How To Test The GM Ignition Control Module (1995-2005). How does the GM distributor mounted ignition module work? OK, once the fuel injection computer receives the Distributor Reference Hi Signal, it starts activating the fuel injectors and above 400 RPM, starts to send a 5 Volt Bypass Signal to the ignition control module. It's with the Bypass Signal that the computer starts to retard and advance ignition timing...
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What causes a gear shifter to become loose?

What causes a gear shifter to become loose? Generally, most all gear shifters will become loose due to aggressive gear changing from the gear shifter. Aggressive gear changing can cause damage to the bushing on the bottom of the gear shifter lever. Why does my Chevy Corvette have transmission problems? 460-horsepower 6.2L V8 6-speed shiftable automatic RWD Due to a metallic grinding sound at idle, car was brought into shop and determined to have worn bearings in or near the torque tube. Car was torn down after 3-4 weeks of wait time for the part. Torque tube was replaced. How...
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Where is the fuse box in a 2003 Chevy Suburban?

Where is the fuse box in a 2003 Chevy Suburban? Fuse box in engine compartment. The underhood fuse block in the engine compartment on the driver's side of the vehicle near the battery. What causes a Chevy Suburban engine to overheat? Excessive heat causes the chemical additives in engine oil to react with each other, & turn into God-knows-what. This can, in some cases, form an acid that will actually HURT that engine if the oil isnt changed quickly. Good Luck! I have the 5.3L, 16K mile. What kind of antifreeze do I use on my Chevy Suburban? That dealer...
Common questions

Where is the parking brake Chevy Silverado?

Where is the parking brake Chevy Silverado? The parking brakes on a Chevrolet Silverado are located on the rear wheels only. They activate when a system of cables forces a pair of brake shoes out against the inside of a drum. Attached to the wheel hub assembly the shoes are an "O"-shaped unit connected by clips and springs. Why does the emergency brake light stay on in my Chevy C1500 pickup? Why Does the Emergency Brake Light Stay on in My Chevy C1500 Pickup? Vincent Ciulla is a certified master automotive technician who has diagnosed and repaired light trucks, domestic...
Easy lifehacks

What should I do if my washer pump is not working?

What should I do if my washer pump is not working? Access your car's fuse box, find the fuse for your washer pump, and replace it if necessary. You may need to take your car to a professional mechanic or auto shop to fix wiring or electrical problems, especially if the washer is activated by a button on the car's steering-column. How to know if my windshield washer pump is faulty? 1 Try popping your vehicle’s hood if you have trouble hearing the pump. 2 If you hear your pump humming but you don’t see any fluid coming out from...
Common questions

Why does my truck have a choppy idle?

Why does my truck have a choppy idle? Causes of a rough idle. Many different problems could result in a rough idle for your car or truck, including: dirty fuel injectors, clogged air filters, bad spark plugs, and a variety of exhaust system issues. Why is my Chevy Silverado running rough at idle? Really, your Silverado will be running rougher at any RPM, but a misfire will be most pronounced at idle. Spark Plug Wires – While not every model and engine combination of vehicles today comes with spark plug wires (a lot are now coil on plug), if your...
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Why does my Chevy Tahoe Air Conditioner keep blowing hot air?

Why does my Chevy Tahoe Air Conditioner keep blowing hot air? When the air conditioner in your 2003 Chevrolet Tahoe starts blowing hot air, you likely have a freon leak. Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. How can I add refrigerant to my Chevy Tahoe? Recharging the freon in your AC system is an inexpensive and easy first step to restoring the cooling capacity of your A/C system. Most refrigerants include a leak sealer that will seal small leaks in addition to filling...
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What are the VIN codes for a Chevy Uplander?

What are the VIN codes for a Chevy Uplander? Also has 3 codes, 0050,0253,0254 still trying to figure what needs replacing. I have a 2008 Uplander LS with the 3.9L Flex Fuel engine and I think I have found a way to fix the service ABS, traction control, stability system warning light. What is the service ABS code on a Chevy Uplander? Also has 3 codes, 0050,0253,0254 still trying to figure what needs replacing. I have a 2008 Uplander LS with the 3.9L Flex Fuel engine and I think I have found a way to fix the service ABS, traction...
Easy tips

When did the last Chevy Avalanche come out?

When did the last Chevy Avalanche come out? Breaking with a long-standing tradition, the Avalanche was not available as a GMC, but only as a Chevrolet. Production of the Avalanche started in September 2001 and ended April 2013; producing two generations in its lifespan. What kind of ethanol does a Chevrolet Avalanche use? Later models introduced another version of the Vortec 5.3-liter V8 as the engine is now capable of running on E85 ethanol. Can a Chevy Avalanche be ordered without cladding? From mid-year, Avalanche could be ordered without the cladding. The uncladded model, known as the Without Body Hardware...
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What is the drive cycle for catalyst and oxygen sensor?

What is the drive cycle for catalyst and oxygen sensor? You will need 10-15 minutes of steady state cruising at 55-65 mph to run the oxygen sensor test. Cruise control works well for this. Do not exceed 65 mph or drop below 55 mph if at all possible during this portion of the drive cycle. After 15 minutes of minutes. This will trigger the catalytic converter test. After the 2 minutes of Can a drive cycle fail to complete a catalyst monitor? In most cases, you should be able to complete the catalyst monitor after following the drive cycle a...