One of your brakes may be stuck. If your not mechanically inclined take your car to a brake person ASAP.
The brake light switch needs adjustment. Located on the brake pedal swing arm. Adjust until the light comes on when the pedal is moved 1/4 inch.
QR-1C valve takes air from the PP-1 or MV3 valve. That air goes through a line to the inlet of the QR-1C valve. As it does, it pushes down a diaphragm, which covers the exhaust port. Thus, the air is piped out of the outlet ports to the spring brake side of the brake chamber. When the air supply is removed, the diaphragm returns to an open state. This opens the exhaust port, and air from the spring brake chamber is evacuated out through it. If it's leaking air, if your brakes aren't releasing, if your brakes aren't setting when you pull the yellow brake control valve, or you get air exhausting steadily through the treadle valve with the brake control valve pressed, an issue exists.
Check the release switch that connects to the brakes. On many vehicles the brake light switch will cause the cruise to disengage. Next time, try pulling up on the brake pedal when you engage cruise. If it works when you're pulling up, you might be able to adjust the switch. It's physically connected to the brake pedal.
It is located on a bracket about 8 or 9 inches above the pedal pad for the brakes...should have an electrical connector plugged into the back end of it. Pending on cruise control the assembly could be plastic or threaded metal as the switch body. Stu Louisville KY
No, as long as your pedal seemed good before the brake job, and you do not loosen the bleeder at all, you do not have to bleed the brakes.
If you replace any brake component that breaks the brake fluid seal or you let it get very low of brake fluid, yes, you must bleed the brakes.
you dont you bleed and adjust the brakes
To bleed brakes on your 2008 Uplander front and rear, disconnect the brake line at the caliper.
Does this Blazer have four wheel disc Brakes? NEW ANSWER: There's no reason to bleed brakes if you did not open the system.( where brake fluid came out )
YES!
How to bless a wet brake system
All brake hoses and calipers must be intact and hooked up to bleed any brakes. You cannot do it with hoses removed.
The brake pedal has nothing to do with it. If air is in the system then bleed the brakes.
The type of vehicle is not important, but if brake pressure is failing, you need to bleed ALL the brakes.
bleed your brakes there might be air in the lines or the brake booster is bad try to bleed all 4 brake 1st
How to fix brake will not bleed out