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10.0
really awful- Typical Repair Cost:
- No data
- Average Mileage:
- 98,850 miles
- Total Complaints:
- 1 complaints
Most Common Solutions:
- requires new motor (1 reports)
cooling system problem
Helpful websites
- No one has added a helpful site for this 2003 Avalanche problem yet. Be the first!
A D V E R T I S E M E N T S
Keep an eye on your coolant usage; when I first noticed some minor coolant loss, I did not think too much of it. However, at about the same time my Avalanche Z71 5.3L engine began to have a little valve tappet noise. My dealer added some Mystery oil, with an oil change and my valve tappet noise cleared up. Unfortunately, within a short time my trucks valves found their voice again, and I noticed that the coolant was again low, I than checked my oil cap and noted some emulsion �further checking by the dealer revealed coolant in the oil along with a cracked head.
- Wayne V., Salt Point, NY, US