Chevrolet Astro adaptive cruise problems

Filed Apr 21, 2020 · Acceleration · 70,000 miles · MN

Once or twice per year when using cruise control, when I touch brake to deactivate cruise, it doesn't disengage. I then have to stand on brake with all my effort to stop van and pull over to put in park. Engine continues racing til I turn key off. Then everything ok til next time maybe months later. Switck on brake petal is ok. Once in the winter, cruise control pushed me into an intersection. Luckily other traffic realized I couldn't stop. No codes show up to identify cause. Been doing this 4 or 5 years intermittently. Even tho this van is 16 years old, it only 6has 90000 miles on it. I try not to drive it much because of this problem. My best guess it's mechanical or computer problem but since it happens so seldom hard to diagnose.I have another astro 5 yr older with 230000 on it and cruise works like it should. I have no more information.

Filed Dec 11, 2011 · Acceleration · 103,412 miles · MD

Had cruise control engaged prior to entering a reduced speed area and it functioned normally. After departing the reduced speed area, I engaged the resume function and the vehicle accelerated past the set speed and kept speeding up. I was able to control the vehicle with brakes although they got very hot and smoked severely. Attempts to turn off the cruise control failed, as well as turning off and removing the keys from the ignition. After successfully stopping the vehicle, I continued attempts to disengage the cruise control but any attempt to start the engine resulted in immediate racing of the engine. I examined the owner's manual and discovered that fuse number 6 was labeled "cruise module, cruise control switch, electromechanical mirror". The fuse was removed but the engine raced upon attempting to start it. I then discovered that fuse number 18 was labeled "vcm-ign 3, vcm-brake, 4wal, cruise stepper motor signal". Upon removing this fuse, I was able to start the engine, and it remained in normal parameters. I did notice that the antilock light was on, but believe this is related to the vcm-brake label on the circuit breaker. I was then able to continue driving the vehicle home, and will be contacting the repair shop to disable/remove the cruise stepper motor, as I refuse to chance another unintended acceleration event.

Filed Mar 11, 2010 · Acceleration · 130,000 miles · ME

Tl*the contact owns a 2000 chevrolet astro van. While the cruise control was set at speeds of 65 MPH, the brake pedal was applied to disengage the cruise control. However, there was no response. The vehicle continued to abnormally accelerate while the brakes were applied. There was an extremely loud roaring noise coming from the engine with an increase in the rpms. The vehicle was rapidly approaching a traffic light and the gear was shifted into neutral position. The engine was turned off. The vehicle was coasted to a stop with very limited braking power. After several moments, the vehicle was able to restart. The vehicle was able to resume operation. The vehicle was taken to the dealer. The cpu (central processing unit) and optical wheel sensors were intermittently faulty which required replacement. The sensors were cleaned to correct the problem. The identical failure occurred on a separate occasion. The vehicle was taken back to the dealer that advised the replacement of the entire cpu. The vehicle has not been repaired. The failure and current mileages were 130,000. Updated 4/26/10 *cn updated 06/17/10

Filed Jan 7, 2010 · Fuel system · 101,487 miles · MN

I own a 2003, chevrolet astro. On sunday, june, 28, 2009, I was driving on I-94, between alexandria, mn and fergus falls, mn. I had my cruise control set at 70 MPH, the posted speed limit, when I approached a vehicle that was traveling at a slower speed. I pulled over to the left lane and proceeded to pass. As I was passing, I looked in my rear view mirror and noticed a vehicle was coming up to me at a fast pace, so I stepped on the accelerator, to get by the vehicle, that I was passing, a little quicker. When I passed the vehicle, I let up on the accelerator, to get back to the speed I was previously traveling. Instead of my vehicle slowing back down, it continued to go faster, I touched my brake pedal, to release the cruise control, but my vehicle continued to pick up speed, 80mph and climbing. I then stepped on my brake, on and off, to get back to about 60mph, moved my switch,for the cruise control, to the off position. I continued to pick up speed. There just happened to be an exit, to a town, so I went up the exit, stepping on and off the brake pedal to slow down. When I got to the top of the exit, I turned off the ignition and with the help of braking, I coasted to a stop. At this point, both my wife and I were very scared. I thought my cruise control had stuck, so I turned on the ignition and the engine roared, so I shut it off. I tried it once more and the same thing happened. Then I knew it was more than the cruise control, so I called my roadside service. After about a two hour wait,they brought my van to a chevrolet dealer in alexandria, mn. It wa determined, by a mechanic, the next day, that my accelerator cable was frayed and that caused it to stick. The accelerator cable was replaced. I have the frayed cable.

Filed Dec 24, 2008 · Fuel system · 96,034 miles · MI

My 2000 chevrolet astro has an accelerator that does not stop its acceleration when the gas pedal is released. Depending on the slope of the road, the vehicle may gain speed until it is shifted into neutral. It is not a big event on dry roads, but yesterday when it happened in the snow, it almost caused a crash. I have had it serviced by different dealers 3 times and am still having the same problem. It is ready to be picked up after taking it in again yesterday for the same problem. It does this on occasion, but very often after being on cruise control.

Filed Dec 25, 2005 · Electrical · 133,000 miles · IN

My wife was traveling southbound on route 41 in princeton, indiana, at approximately 55 - 60 m.p.h. Unexpectedly, and without her command, the cruise control engaged itself and forced the vehicle to accelerate rapidly. Please note that she was not utilizing the cruise control function at the time. Applying the brakes did not have the effect of disengaging the cruise control. Driver was fighting the force of the drive train unintended acceleration with full brake force, but the vehicle would not come to a safe stop. Finally, my wife had the presence of mind to put the vehicle in neutral to disengage power to the rear drive wheels. She activated the parking brake and the primary brakes to stop the vehicle. Once fully stopped at the side of the road, she called me at work for assistance. We had the vehicle taken to a repair shop and were informed that the cruise control module on the engine firewall had malfunctioned. The technician unplugged the electrical connectors to the module to permanently disable it.

Filed Jun 8, 2005 · NV

Dt: owner took the dealer, ann davids was the manager, the dealer denies any problem. The first day, owner notices a dust under hood, then noticed the wires were burnt underhood and under car.took car back to dealer, and everything was apparently okay. Owner tried cruise control to check the vehicle, when cruise control was on, vehilce accelerated unintentionally, then owner pulled off and put the car in neutral. When in neutral, the vehilce started to rev. Then a big bang, and smoke was coming out of the exausht. After vehicle cooled, he shut off the cruise control, and checked the accelerator, then started the car again. The accelerator stuck again, when this happened, the driver would put it neutral. Car was taken by tow truck to the dealership. The manager reports all if fixed, but no cruise control. 450 dollars for new cruise control.

Filed May 17, 2005 · Acceleration · 10,500 miles · VT

Dt: without warning the cruise control will shut off when the consumer hits a bump. The consumer doesn't know when it's going to happen. The dealer was unwilling to troubleshoot, because the manufacturer will not reimburse them for the cost. The manufacturer will not pay to have test run on car. The consumer does not feel it's his place to pay.

Filed Jan 21, 2003 · Acceleration · 55,081 miles · WI

Family and I were on hwy 441 traveling at 60 MPH. I braked and went down to 50 MPH as I began to make an exit off of this hwy. I let off brake and car sped up to 60 MPH and the cruise control was never on. I was on exit ramp going 60. I was forced to put transmission into neutral. I coasted to a place off the roadwhile engine was "reving at high RPM's". I snapped the gas pedal and engine went faster. I reached down to pull on gas pedal and throttle cable broke. Vehicle was towed to a gm dealer the next morning. Their diagnosis was a dirty throttle body and stuck throttle cable. Never heard of an excessively dirty throttle body causing this type of problem, especially to a 3 yr. Old vehicle with 50,000 miles.

Filed Jun 27, 2002 · Acceleration, Brakes · MO

While driving at highway speed, applied brakes and without warning heard noises. Driver states felt like something was dragging. Dealer has been notified; however, could not duplicate the problem.*ak consumer adds applying the brake pedal did disengage the cruise control, but did not slow the vehicle. Presently, the brakes appear to be working, but have not had to make anymore emergency stops at highway speed.