My 2003 denali dies sometimes, starts right back up then dies down the road, or it may go all day without dieung again. also instrument panel stops working sometimes goes black and comes back on but the fuel gage will never work. also when we stop or go there feels like a grabbing or vibrate sound that you can feel in your foot coming thru the pedal

SOURCE: On my 2005 subaru legacy outback 2.5l replaced

If I understand you correctly, you feel a vibration it the brake pedal when you apply the brakes. Is that correct?
Have your brake rotors re surfaced; they are warped.

"engine makes cavitating noise" ....what does this mean?

SOURCE: Brake pedal vibrates while braking and doesent stop right away

There's speed sensors at each wheel. You may have got some contamination in front of one of them... sounds like the abs is trying to compensate for un equal speed at each wheel... and something may be blocking a proper read at one of the wheels...

SOURCE: Front End Rattle

I am guessing it is still under the factory warranty. Take it to the dealership and have them fix it for free.

Marvin

• 85242 Answers
• Posted on Aug 12, 2009

SOURCE: my 97 jimmy sometimes dies while driving and

Here is the common cause of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.

John DeCosta

• 155 Answers
• Posted on Oct 07, 2009

SOURCE: grinding under car while driving - brakes dont work HELP!!!!!!!

Wow, you have a few problems there. The grinding sounds like a driveline problem. Does the grinding get worse or louder as you increase speed? That grinding could be coming from a number of places. Everything from a universal joint on the driveshaft to the transfer case. Try shifting from 2WD to 4HI. Does the truck go into 4HI? If it does, shift to neutral, and put it back into 2WD. Sometimes the actuator for the 4WD can get stuck. If that doesnt work, can you try to pinpoint exactly where the noise is? I know that sounds hard, and I saw where you wrote you can feel it under your feet. Is it everywhere though? Can you feel it in the steering wheel, for example?
As for the brakes, are they always that hard to stop? Or is it after the grinding starts? Is either the brake or ABS lights on on the dash? Does the pedal feel mushy or very hard? A mushy pedal usually means a bad master cylinder, while a very hard pedal usually means a bad power brake booster. I'll be honest with you, none of what you described sounds cheap, regardless of where you take the truck to get looked at. They are most likely going to charge you for a few hours of diagnostic time just to figure out whats wrong. Thats why I asked if you could try to narrow down exactly where the noise is coming from. Theres a better than average chance your going to get ripped off, simply because it's not clear and obvious what the problem is. Do you know anyone who has any knowledge of cars? If so, take them for a ride and let them hear it. 2 heads are always better than one. If you can think of anything else, let me know, and I'll be glad to try and be of more help.

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