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Avalanche 1500

Confirm that there are no parasitic loads while the car is both idle and running. The grounding of the alternator should be checked. If grounded through the block, make sure all engine to body grounds are adequate. The actual output...

Hello. I usually start by checking the brake fluid level and the level sensor. Most of the time when these lights are on together it is because of low fluid. If the fluid level is good and if the sensor...

Yes, but any component in the lighting circuit could cause or contribute to the problem. An intermittent fault is causing a voltage drop in the circuit and that, in turn is causing the lights to dim. Often, there is a...

Hi There, As you know, code P0332 relates to the knock sensor, which may be a result of code P0306, which relates to the crankshaft position sensor. When the crankshaft position sensor (https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement) is detected to have more than a...

What you are describing is often a sign of low transmission fluid (https://www.yourmechanic.com/services/transmission-fluid-service) or a faulty transmission control solenoid. As you know, automatic transmissions use pressurized hydraulic fluid to change gears. Every time a gear change is required, the car's...

Check to see if any diagnostic trouble codes have been stored and use a real time scanner to check the response of the throttle position sensor and oxygen sensors. The throttle position sensor sends a reference voltage to your power-train...

Hi there. Your 2004 Chevrolet Avalanche should have an anti-lock braking system; which in most cases will restrict the braking to ensure this doesn't occur. However, there are some things that will restrict the ABS from working as it should...

When a low oil pressure warning (https://www.yourmechanic.com/services/oil-pressure-light-is-on-inspection) is displayed, it can normally be narrowed down to one of three basic causes. An oil pressure sensor that is reading a faulty pressure, oil pressure that is actually low due to worn...

It sounds like you may have a fuel pump that is not working properly or maintaining enough fuel pressure to keep the motor running. If the engine was run completely out of fuel, there is a chance this could have...

Hello, thank you for writing in. The vehicle is likely facing two different issues. While it is possible you are feeling a rough idle in the steering wheel, you may be facing a worn or dirty brake. The extra strain...

Hi there. Since the transmission fluid is a little dirty, I recommend replacing the fluid with the transmission filter. The torque converter will be working normally at all times and it will not cause the vehicle to slow down when...

If the ABS warning light is on, that means that there are downloadable ABS diagnostic trouble codes, much like the codes you would download if you have a Check Engine Light diagnostic (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection). The ABS trouble codes will give a...

Hi King. Thanks for writing in today. You can request an estimate to have one of our mobile mechanics complete the fuel pump replacement for your Chevrolet Avalanche by clicking this link to the service page](https://www.yourmechanic.com/services/fuel-pump-replacement). In regards to doing...

Hi There, This is completely normal for the oil pressure to increase when accelerating. The oil pressure inside the motor increases as the motor works harder. Your oil pressure switch (https://www.yourmechanic.com/services/oil-pressure-sensor-replacement) reads this change in pressure and relays this to...

Check to see if any diagnostic trouble codes have been stored in both the PCM and TCM. Check the fuses in the circuits that power the transmission controls. Occasionally, a short in a sensor such as an oxygen sensor will...

Hello, thank you for writing in. The traction control system and the ABS work hand in hand to help keep you on the road in slick conditions. They are both monitored heavily by the computer which makes diagnostics a lot...

Rear sway bars are to help the rear of the vehicle to be stable when driving around turns or maneuvers and when towing another vehicle. The sway bar should not affect the vehicle when hitting bumps unless the links or...

The noise is the parking brakes are out of adjustment and the brakes are dragging. Check the rear brakes and see if they are releasing when going in reverse. If you need further assistance with your brake system (https://www.yourmechanic.com/services/parking-emergency-brake-does-not-work-inspection), then...

Hi there. The computer could be putting the vehicle into limp mode due to an issue that may be happening and reduces the engine performance. Check the battery, alternator, and all of the sensors on the engine and make sure...

You should have the power steering reservoir cap checked to make sure the vent on cap is not blocked. Also make sure the system is bled of excessive air in the system. Once these two things are checked then you...