When i push on the brake pedal, both (Left and Right) signal lights come on solid.

Chevy has a different circuit for the brake-lights. Strange that the brake-lights don't go out, after the fuse and/or relay is removed. Unplug the brake-light switch. Are the brake-lights out now? The brake-light circuit travels through the turn signal switch. There could be a failure inside the turn signal switch or there could be a short in the circuit, causing the brake-lights to stay on. You can try removing fuses that have to do with protecting the turn signal and hazard flasher circuit. If this allows the brake lights to go out then I think you will have narrowed it down. What other tests have you run? Have you removed and inspected the lighting in the rear? Do you have a trailer hitch? I ask because in some applications, there can be a 12volt power source. If the power wire shorts against the brake-light wire, you can have this fault. Please let me know if this helps and feel free to write back with any questions. Be as detailed as you can. You are the eyes and ears of this subject, good luck.

make left turns only?

Check the trailer wires for damaged wires that may be crossing.

hello same pronlem with my 98 durango but right turn signal!

what it was is the 4 pin connector for the tow package had the insulationripped off them i guess whe backing out of a steep driveway it sxrapped! so the headlights, turn signals, and brake circuits where grounding out! quick fix!

just cut and capped that mess!

good luck

Did you bench bleed the MC before installing it? If not, that's the problem. MUST be bench bled or you'll always have air. If brakes lights are on, the brake switch is out of adjustment OR (since you replaced the MC), the push rod is out of adjustment

you are describing a typical turn signal switch problem, all those systems run through this switch, its about a 110 dollar part

check brake light switch on brake pedal could have pushed out of its scket or its possibly bad .try holding brake pedal down and pushing brake light switch in some then release brake pedal and check to see if lights go out

check the type of bulb in the left turn signals. sounds like the wrong bulb has been installed

the upper brake light works differently than the outer lights. check your brake light switch by the brake pedal.It will have a plunger switch on it. The center brake lamp works off a power convertor instead off the brake light switch. The switch has a separate wire for that which is still working

its your blinker box.. all major lights run through there

Igot the same problem on left side.The problem was the convertor for the trailler plug.