no HD

Thank you Joisey for posting this. I had the brake line rust through going to the right front last week. 99 Silverado 2500 (no HD), that I had bought in 2010. While replacing the line I noticed 3 other brake lines had already been replaced, which kind of surprised me a bit, seeing very little other rust under there. It wasn't a fun job for sure, doing it on a creeper, with no lift. It was equipped with standard 1/4 inch tubing, but of course the flare nuts GM used are different from the flare nuts that come on the tubing that you find at the auto parts store. They did have the correct flare nuts in stock, I just had to cut the tubing to install them and re-flare them again. I had a double lip flaring tool. I came straight out of the ABS controller with the new line and ran it along the inside of the frame, ( it came from the factory coming out of the controller and going to the outside of the frame rail) and then pretty much routed it the rest of the way as it was from the factory. I tried gravity bleeding the system first. When that didn't work, my wife helped me bleed them and now all is well. I know I might have found the lines at the dealer with the correct flare nuts but I've found your usually better off in the long run not going there until your forced to.

The LED tail light bulbs are probably causing the fast blinker issue. They don't pull the amperage that the incandescent bulbs do. People have wired in resistors to make them blink properly. Also the side marker lights sometimes use as a ground the turn signal circuit. One wire is hot with the parking/tail light circuit and the other wire is getting it's ground from the filaments in the turn signal bulbs. Then when the turn signals are flashing that's why you get the alternate flash from the marker lights when the headlights are on, because both wires are hot when the signal is flashing. When the headlights are off the side markers blink with the signals because they are using the filaments in the parking/tail light for ground. It's similar to a trailer without a proper ground and everything blinks opposite. Sorry about the long post. Not very gifted when it comes to writing. Maybe try putting incandesants back and see if that resolves both issues, if it does and you still want the LED's wire in a resistor.

michaelj239, On my 99 Silverado, the turn signals and 4 way flashers use a separate bulb to themselves. The stop lights are double filament bulbs used with the tail lights. Check yours to see if maybe you have 2 blown bulbs. That would explain why the 3rd brake light works and the hazards and signals work but no brake lights, they might be same bulb as the tail lights. Just a suggestion.