Top 10 2001 Chevrolet Silverado Questions & Answers

i need the wiring diagram for mass air flow sensor on a 2001 chey silverado 1500 4.8

I would look at the air blend doors first, it sound like they are not working or your control in the dash is not working send a signal to them. they work by changing the air from hot to cold or in between.

Avalanche, Sierra And Silverado

1. Remove the floor air outlet duct extension (1) from the floor duct (2). Remove the floor air outlet duct extension (1) from the floor duct (2)
2. Disconnect the electrical connection at the blend door actuator (10). Blend door actuator and related components
3. Remove the blend door actuator mounting screws from the HVAC module.
4. Remove the blend door actuator as an assembly with the actuator cam. Remove the blend door actuator mounting screws from the HVAC module

1. Install the blend door actuator as an assembly with the actuator cam.
   1. Line up the heater/defroster valve lever with the blend door actuator cam slot.
   2. Line up the A/C valve lever with the blend door actuator cam
2. Install the blend door actuator mounting screw to the HVAC module.
   1. Tighten the blend door actuator mounting screw to 14 inch lbs. (1.6 Nm).
3. Connect the electrical connection at the blend door actuator (10). Blend door actuator and related components
4. Install the floor air outlet duct extension (1) to the floor air duct (2).

1. Disconnect the electrical connector to the mode actuator that is located on the left side of the air distribution case.
2. Remove the screws.
3. Remove the adjuster links from the control lever.
4. Remove the mode actuator.
5. Adjust the mode actuator by completing the following steps:
   1. Connect the electrical connector to the actuator.
   2. Turn the ignition switch to the RUN position. Allow the self-positioning of the actuator.
   3. Turn the ignition switch to the OFF position.
   4. Remove the actuator from the electrical connection. Blend door actuator-C/K Series

1. Install the mode actuator.
2. Install the screws.
3. Install the adjuster links to the control lever.
4. Connect the electrical connector.
5. Test the circuit operation

Tony,

When bleeding brakes after the system has been opened for service (you didn't say if you were doing any work on the master cylinder) you should start with the farthest wheel away from the master cylinder, which is the righ rear. Fill the master cylinder, then have an assitant "pump up" the brake pedal. Tell them to hold it down firmly, then open the bleeder on the wheel cylinder(s). Do not release the brake pedal until you have closed the bleeder valve again. You'll know when the air is out - there won't be any more bubbles. Since this vehicle is 2001, this would be a great opportunity to flush the system. Just make sure you have enough brake fluid (DOT 3 or 4, depending on your vehicle). Good luck!

Unfortunately the ABS relay is built into the EBCM. Electronic Brake Control Module. That is located on the frame rail, left side of vehicle and sits on top of the pump. Both parts are likely to be replaced together as getting the module off the pump can be difficult. I recommend a repair facility do this job but it can be done at home. You will likely need to take loose metal brake lines and that can be quite a task also.
Are you getting a code for the relay / EBCM?

Good luck
Please rate my answers if they helped.
Brett

most likely needs a LH (bottom) temp actuator. Located in the center of the dash on the bottom, you have to remove the hush panel on the rh side of the truck

HI, click the link below to be directed to a full diagram that will show you the actual location of the sensor. 718 will be the actual sensor to extract and 739 is the mounting screw for the KS.

KNOCK SENSOR DIAGRAM

The airbag in your vehicle is an important safety device, and the airbag module ensures the proper functioning of your vehicle's air bag. If this module is not functioning properly, your airbag may not deploy during a crash. When there is a malfunction, your airbag module warning light will illuminate on your vehicle's dash. You will need to have the airbag assembly checked out by a qualified mechanic, but once that is done, you can reset the warning light and airbag module unit. If you've never done this type of job before, it should only take you 5 minutes.

1. • 1 Open the hood and loosen the retaining nut on the negative cable wire cable clamp using a socket wrench.
     
   • 2 Slide the cable clamp off the negative battery terminal.
     
   • 3 Wait 3 to 5 seconds and reconnect the battery terminal. Tighten the retaining nut using a socket wrench. Once the power is restored, the airbag module should be reset.
     
   • 4 Verify that the module has been reset by turning the ignition key to the "II" position and checking to make sure that the airbag light does not illuminate.
     

there are 2 fuses only for the abs on the trk. 60 amp #2 maxi fuse and fuse #3 10 amp fuse for the ebcm. there isnt any relays for the abs.

give current to grey wire to fuel pump and listen if fuel pump work
.if not then wire to fuel pump open or fuel pump defect . check the ground black wire at fuel pump to frame

hope it help

Well you need a pressurizing tool, no way around it have it done or borrow the tool from Autozone.