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...
If the check engine light is only coming on when your on the freeway it might be a problem that the computer is only recognizing at cruising speeds. Your best bet would be to have a certified mechanic read the...
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 (https://www.yourmechanic.com/services/blower-motor-switch-replacement) bypasses the resistor and operates the blower relay (https://www.yourmechanic.com/services/blower-motor-relay-replacement) sending full battery voltage from the...
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....
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...
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...
The brake booster (https://www.yourmechanic.com/services/vacuum-brake-booster-check-valve-replacement) 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...
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...
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,...
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...
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...
I would try the spare key a few times to see if its a problem with the individual key or the tumblers in the lock cylinder itself, if it works with the spare have a few copies but if you...
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...
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...
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...
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...
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...
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....
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...
Thanks for writing in about your 1998 Chevrolet C1500 Suburban. I would want to diagnose the brake pedal switch (https://www.yourmechanic.com/services/brake-light-switch-replacement) first so I wouldn't replace one that is working fine. A technician using scan tool will easily be able to...
