2002 Avalanche emergency brake isn't working and the rear end went out in it yesterday 8/10/07 at 92,000 miles.

- Acworth, GA, USA

Service 4X light comes on almost everytime driven roaring in drivetrain with relation to speed of truck understand this could be workmanship problem.

- Clemmons, NC, USA

2002 Chevrolet Avalanche experiencing a loud knocking noise as well as the front end shimmies when going over bumps in the road.** answer required***. the vehicle was taken to the dealer but they were unable to find a problem. The only problem they found was that the vehicle needed an alignment and new tires. The vehicle was taken to a tire dealer for a second opinion. When the technician removed the rear differential cover broken parts fell out.

- Oceanville, NJ, USA

Front and rear differential bearing failure on 02 Avalanche at 51,000 miles- brought to dealer before total failure. Other similar complaintis can be found in the club Avalanche website. This defect could lead to wheels falling off and catastrophic injury. GM is aware of the problem but does nothing.

- St. Louis, MO, USA

Beginning on 06/09/03 and continuing to the current date, my vehicle has had a recurring front differential leak. First 3 repairs were for the differential seals, until it was discovered that the vent tube was plugged, the next 4 times for repair were due to the fact that when this vehicle is driven on a trip for an extended period of time on the highway, the front differential purges the fluid out the vent tube. The last trip I took the vehicle on was a 400 mile round trip and the vehicle underbody was half covered in diff oil, and it continued to drip for 2 days. My concern is a longer trip, which I purchased the vehicle for, would result in the seizing of the front differential at highway speed, possibly causing an accident.

- Northfield, OH, USA

Overtime I kept hearing a whining noise, smell of oil, heat and light vibration from the driveline. At the dealership on a 100, 000 mile total oil, transmission and coolant change (did this at 97,018 mi. 1/2/04). The mechanic did notice a bit of play in the front & rear driveline (drive shafts from transfer case to the front wheel axle case and the rear axle case), some oil leakage on the right front axle, both sides of the rear axle, this was normal he told me. Mechanic found both fine and small pieces of metal in the front 4X4 transmission case, but said this was not a big problem. Mechanic suggested that I should have the U-joints replaced sometime on the drive shafts and this would stop the noise and vibration. At coldwater, mi. (1/14/04), I had to replace a right front hub bearing; mechanic reported to me that he would like to inspect the rear axle for noise. Mechanic found some play in the driveline U-joints, right rear axle and pinion shaft, and some noise coming from the differential. On 1/26/04 I had both rear & front driveshaft U-joints replaced & balanced (fleet pride said there was some play in them). The noise and vibration stopped, but the oil & hot smell stayed. Then the light vibration and some noise (between the speeds of 40-75 mph) started to return in just 150 miles. At 106,606 miles the rear axle started to make a clunking noise and hard vibration then stopped turning at 106,607 miles. I had the rear axle removed and found that the main bearing on the left side of the mechanical locking differential (eaton G-80) had broke apart sending metal through out the rear axle and destroyed axle drive system. I have pictures of the parts & damage to the rear. The front axle is starting the same thing, leaking, hot smell and noise. I have found through your system that they have been having problems and when I asked the dealership about this, they said they are checking into it. Service bulletins 03-04-17-001, 03-07-30-005, 02-04-21-005A.

- Black River, NY, USA

The consumer heard a rumbling noise coming from front and rear wheels. The mechanic replaced the front and rear pinion bearings but this did not remedy the problem. Later the differential was found to be the problem and it was replaced.

- New Iberia, LA, USA

Consumer states that the front differential is blowing out oil causing other parts of the vehicle to burn, the dealer was unable to fix the problem.. consumer states the gear oil blows on left front brake and all the rubber hose wires, lines tires and running board making the left brake fail when wet.

- Whitehouse Station, NJ, USA