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C1500 Suburban

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Q: Vehicle running rough and stalling
Hi, in this case, the PCV should be checked, it may be a little dirty. The elbow on the vacuum line at the throttle body may need to be replaced. Inspect for cracked vacuum line from the throttle body to...
Question
Q: 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
Q: 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
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
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
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
Why would I have an intermittent spongy brake pedal on my 1999 Chevrolet Suburban
Hello. Most of the time this is caused by the master cylinder failing internally. If you have replaced it with a new one then that should not be the issue. If you used a rebuilt master cylinder then that may...
Question
Q: 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...
Question
Steering becomes slack while making turns in either direction.
Hello. Thank you for writing in. There are several components that may cause the steering to be loose or jerky. The first thing to do is check the power steering fluid color and level. Make sure its clean and topped...
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i upgraded from 28.9 in tire to 32.4 in tires. a week later transmission went out, what should i change to relieve strain on trans
The change in shift points generates added heat in terms of operation. Increasing the tire tire diameter more than a percent or two affects the transmission shift points, as the shift points were programmed based on the vehicle's original tire...
Question
I don't know the name of it I was hoping to be able to post a picture of it but it's the pole that the hub go on it's sliding out
I am not sure of the noise you are describing but I think you are describing the front hub spindle and most likely have bad wheel bearings in the hub if there is noises coming from it when turning or...
Question
Q: Crank no start
Hi there. The issue seems to have a misfire with the spark plugs and wires. The smoke that is coming out of the breather on the intake or valve covers is caused by the fuel burning on the exhaust stroke....
Question
My front right tire is smoking, and we are driving in the free way? What's going on?
You may have a wheel bearing gone bad or there is a problem from the brakes. Inspect the back of wheel to see if any road debris like a plastic bag did not get on brakes? If no debris then...

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