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C1500 Suburban

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Question
Timing off
The pinion teeth of the starter motor engage with the teeth on the flex plate, and the starter motor cranks over the engine. I don't see how you could have messed up your timing during a starter replacement. But it...
Question
Loud knocking from engine area
Loud knocking sounds from the engine are often a sign of catastrophic failure, but not in every case. Inspect the engine oil level, and look for metallic flakes floating within the oil. Worn or broken parts along the engines belt...
Question
Headlights not working?
The multi-function switch is a common fault with your Chevrolet C1500 Suburban. Sometimes the lights don't work at all. Other times the high beams will work but not the low beams. Moving the column up and down could possibly indicate...
Question
Cruise control quit working
Thanks for writing in about your 1998 Chevrolet C1500 Suburban. I would want to diagnose the brake pedal switch first so I wouldn't replace one that is working fine. A technician using scan tool will easily be able to see...
Question
Check engine light and P1345 code
I'm thinking that they may have sold you a V6 distributor. Remove the rotor and look at the top of the vane cup for a "6" or an "8". It there is a 6, it's a V6 distributor and won't...
Question
Suburban idling high and won't accelerate
The symptoms that you are experiencing with your Chevy have lead me to believe that your Suburban is experiencing issues with its’ Throttle Position Sensor (TPS). If the TPS is failing, it will duplicate many of the symptoms that have...
Question
Problem starting GMC
There can be a variety of reasons why your GMC is experiencing an intermittent no start. A faulty park/neutral switch or a failing ignition switch can definitely duplicate the symptoms you are experiencing with your vehicle. To be 100% certain...
Question
Trouble code P0455
You should have a mechanic use a smoke machine to test the system for leaks. The purge valve may be leaking causing it to not hold any vapor in the tank at idle. If this occurs it will cause the...
Question
Just bought ran good 100 km now stalls at Red lights
This may be a sign of a failing mass air flow sensor, a failing idle air control valve or potentially a clogged catalytic converter. As you may already know, the catalytic converter converts toxic exhaust gases into less harmful pollutants...
Question
I think my starter is misaligned.
This is often times a result of the starter solenoid being misaligned and not reaching out far enough to the flywheel. You will notice on the starter solenoid there are bolt holes that allow for a slight adjustment. This allows...
Question
misfire on cylinder 4
You had everything serviced except the one thing that will fix the problem. The problem is your central sequential fuel injection system has a clogged or defective injector to the number 4 cylinder. Following the manufacture technical service bulletin 00-66-04-00-30...
Question
Car hesitation from stop to acceleration
Hi, thanks for writing in. Prior to further diagnostics you should install the spark plugs that are referred to in the factory service manual and/or obtain the plugs from a GM dealer. Installing alternative aftermarket plugs with different gaps, materials,...
Question
Brakes pedal kicks back, abs light turns on and prevents gears to shift.
The warning light about the Anti-lock Braking System (ABS) is telling you it is activating. If this is happening on dry pavement, then it is likely a malfunction with the ABS. You definitely want to get this checked out ASAP....
Question
Is it safe to drive around without my MAP sensor plugged in?
Hi there. From the description you have provided, your vehicle's drivability concern should be diagnosed and repaired. It is not advisable to drive your vehicle with the MAP (manifold absolute pressure) sensor disconnected. The MAP sensor's job is to determine...
Question
Problem with the engine. Stalling and fuel system issues.
You have done a good job of updating parts that may not have failed, but do tend to wear down and not work proficiently. When you replace the fuel pump, you must always replace the fuel filter as well. If...
Question
Heater does not work and has a loss of power to the switches.
Hi there. If the motor works fine with power directly to it and when the switch is not working properly causing the motor to come on slower and weak, then switch cluster has failed and needs replaced. If you need...
Question
My car is sputtering
Hello - while a small hole in the exhaust will have an irregular exhaust noise to it, your symptoms sound more like a misfire on one or more cylinders. This could be caused by bad plugs, wires or coils. Other...
Question
Heater does not work
Your vehicle's blower speed selector controls voltage to the blower motor using two different circuits. When high speed is selected the blower control switch bypasses the resistor and operates the blower relay sending full battery voltage from the blower fuse...
Question
Brakes go to floor and are squeaky...
The brake booster is a mechanism that uses vacuum pressure to take the force being applied to the brake pedal and amplify it. If the booster is bad, then the full amount of force needed to activate the master cylinder...
Question
A.I.R. pump is missing in my car
Hello. The A.I.R. system is an emissions system that is designed to inject air into the exhaust manifold to help with the combustion of any unburned fuel before it reaches the catalytic converter, resulting in cleaner emissions. In order to...

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