Hey brother call these places up. Looked under car-part.com 1999-2003 sivlerado 2500 series valve cover. Looking 60-70 dollars for a pair.

2001
Valve Cover
Chevy Truck Silverado 2500 6.0L,LEFT ALUM NOF $35 Tri City Auto Parts USA-NE(Holdrege) E-mail 1-800-445-9117
2002
Valve Cover
Chevy Truck Silverado 2500 6.0,LH, 5154 $30 South Bountiful Auto USA-UT(Woods-Cross) E-mail 1-800-517-2489
2002
Valve Cover
Chevy Truck Silverado 2500 RH,6.0, 5154 $30 South Bountiful Auto USA-UT(Woods-Cross) E-mail 1-800-517-2489
1999
Valve Cover
Chevy Truck Silverado 2500 6.0 LEFT 1003 $20 Grassy Auto Parts USA-KY(West-Liberty) E-mail 1-800-354-7402
1999
Valve Cover
Chevy Truck Silverado 2500 6.0 RT. 1003 $20 Grassy Auto Parts USA-KY(West-Liberty) E-mail 1-800-354-7402
2000
Valve Cover
Chevy Truck Silverado 2500 LH 6.0L 040903 US$18.52
CAN$25.00 P and G Auto Can-ON(North-Bay) E-mail 1-800-461-9562
2000
Valve Cover
Chevy Truck Silverado 2500 RH 6.0L 040903 US$18.52
CAN$25.00 P and G Auto Can-ON(North-Bay) E-mail 1-800-461-9562
1999
Valve Cover
Chevy Truck Silverado 2500 6.0L, IN 03825 EXCH $15 Mr. R's Auto Salvage USA-WY(Buffalo) E-mail 1-800-834-8307
2002
Valve Cover
Chevy Truck Silverado 2500 8.1 NOF $15 Labrum Auto Wrecking USA-UT(Salt-Lake City) Quote 1-888-522-7862 Insurance-Quote
2001
Valve Cover
Chevy Truck Silverado 2500 12570483,R OR L,RS,8.1 NOF $15 Cadott Auto Recyclers and Sales Inc. - QRP Partner USA-WI(Cadott) E-mail 1-800-472-3112
2001
Valve Cover
Chevy Truck Silverado 2500 12570483,R OR L,LS,8.1 NOF $15 Cadott Auto Recyclers and Sales Inc. - QRP Partner USA-WI(Cadott) E-mail 1-800-472-3112
1999
Valve Cover
Chevy Truck Silverado 2500 6.0L,IN 03825 EXCH $15 Mr. R's Auto Salvage USA-WY(Buffalo) E-mail 1-800-834-8307
2002
Valve Cover
Chevy Truck Silverado 2500 8.1 NOF $15 Labrum Auto Wrecking USA-UT(Salt-Lake City) Quote 1-888-522-7862 Insurance-Quote
1999
Valve Cover
Chevy Truck Silverado 2500 LS 306025 $Call Newcomer's Truck Parts, Inc. USA-PA(Waynesboro) E-mail 1-717-762-1532
2000
Valve Cover
Chevy Truck Silverado 2500 6.0,L,ENG NOF $Call Ed's Auto Salvage Can-AB(Westlock) E-mail 1-800-661-9033
1999
Valve Cover
Chevy Truck Silverado 2500 RS 306025 $Call Newcomer's Truck Parts, Inc. USA-PA(Waynesboro) E-mail 1-717-762-1532

Call me when you get all the sh*t allready.

Gary