Two problems related to diesel engine have been reported for the 2003 Chevrolet Silverado. The most recently reported issues are listed below.
While the vehicle was parked the driver noticed a brownish liquid leaking from underneath the vehicle. The driver took the vehicle to the dealer, and the mechanic determined that the filter and other parts needed to be replaced due to corrosion. (the VIN number entered per consumer, did not match the vehicle given).
I purchased a 2003 Chevrolet Silverado duramax in 4/04 used with 21,020 miles. At about 28,000 it started to smoke upon acceleration. This is a very thick blue smoke. The dealer has looked at it twice and says they cannot find anything wrong. But I think if I have to get it checked for emissions that it would fail miserably. It now has approx. 45,000 miles but is still covered with an extended warranty to about 72,000.