I have a 2003 Chevy Silverado 2500HD LT with Duramax Diesel. I have recently lost all brake pressure and can depress brake pedal all the way to the floor. My ABS light came on yesterday while spinning tires in 4wd low and applying brakes. It went away, but when getting unstuck and driving away lost brake pressure. I believe I leaked brake fluid at some point and think that I probably blew my brake line. How should I approach fixing this myself.

SOURCE: CHEVY SILVERADO 2500HD DURAMAX DIESEL

DTC P1093
Fuel Rail Pressure Low During Power Enrichment



The engine control module (ECM) uses the fuel rail pressure (FRP) sensor to determine fuel pressure to the fuel injectors. This is then compared to the calculated target fuel pressure as determined by the ECM. The ECM adjusts the FRP by modulating the duty cycle of the control driver of the fuel pressure regulator. Injector pulse duration is determined by the measured rail pressure and the target injection fuel into each cylinder. If a sensor circuit malfunction is detected, or the commanded fuel injection pump flow is not within the proper range for a given engine load and speed, DTCs will be set.

DTC U1000 and U1255 Circuit Description Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for State of Health monitoring. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. When a module does not associate an identification number with at least one critical parameter within about five seconds of beginning serial data communication, DTC U1000 or U1255 is set. When more than one critical parameter does not have an identification number associated with it, the DTC will only be reported once. The class 2 serial data line on this vehicle is a ring/star configuration. The following modules communicate on the class 2 serial data line:
• The body control module (BCM) • The digital radio reciever • The driver door module (DDM) • The electronic brake control module (EBCM) • The front passenger door module (FPDM) • The HVAC control module • The inflatable restraint sensing and diagnostic module (SDM) • The instrument panel cluster (IPC) • The memory seat module (MSM) • The powertrain control module (PCM) • The radio • The radio amplifier • The rear seat audio (RSA) controller • The rear seat entertainment (RSE) assembly w/U42 • The rear wheel steering control module • The remote playback device-CD player w/U1S • The transfer case shift control module • The transmission control module (TCM) w/Allison transmission • The theft deterrent control module • The vehicle communication interface module (VCIM) w/UE1

Roy Funkhouser

• 140 Answers
• Posted on Aug 28, 2009

SOURCE: Need to know Oil Capacity for Duramax 6.6 in 2004

Hello,
The requirement is 10 QTS. I use 10 and check it cause some times they hold 11 QTS. I hope this helps. If you have more questions reguarding this or other conserns please ask me. Please remember high ratings are very important to me.

Thank You,
Roy

Testimonial: "Thanks very much for that Regards Bryan McRae New Zealand"

SOURCE: Brake lights on a 2003 chevy silverado 2500HD wont work.

same bulb but 2 seperate elements. wiring diagram u should be able to obtain from your local auto parts store like autozone(preferred)

SOURCE: 96 Chevy Cavalier brake pedal to the floor

First check your brake fluid.
Either you have a failing brake booster, or you have developed a leak in one of your brake lines. If your brake line is leaking, it should be pretty evident, i.e. oily looking substance sprayed underneath the vehicle or in the wheel wells, if the booster is leaking (the large black/silver almost bowl shaped thing directly in front of the driver under the hood against the back wall) there will most likely be fluid dripping down the firewall below it, if your brake fluid is extremely low/empty, you probably have a leak, that could be at the booster or on a line, or even at the caliper/drum. If it is empty (which can make your ABS light, light up) then you have yourself a leak. Also, if the fluid is really low, you could try adding some, although you will have air in the lines if it was low enough to floor the brake, but you might be able to find the leak if you refill the fluid and cause it to spray from the leak again. Have someone watch under the vehicle while you do this.

SOURCE: 2003 chevy silverado 2500hd 4wd makes grinding

sound like the shift motor or shift gear in transfer case that makes it go into 4WD.sound like gear damage or worn