here is the thread to find anything on Craigslist:
http://www.themccumbers.com/States.htm
Then pick a state & use the pull down to pick a search.
here is the listing for chevy trucks in Utah.
Results For: logan Found 4 Instances of chevy truck
Sep 11 - Super tough Chevy BLAZER M1009 6.2L Detroit Diesel - $1600 (LOGAN) owner pic
Sep 04 - 1969 chevy c-10 with air ride - $5500 (smithfield) owner pic
Aug 21 - 03 chevy silverado 1500 single cab - $7000 owner
Aug 08 - 1985 Chevy Caprice Classic - (Logan, UT) owner
Results For: ogden Found 19 Instances of chevy truck
Sep 17 - 2005 Chevy Silverado - $8000 (Ogden) owner pic
Sep 13 - TRUCK BED - $795 (Roy-Ogden ) dealer pic
Sep 11 - 1992 chevy silverado extended cab - $1900 (kearns utah) owner pic
Sep 11 - 2005 chevy silverado - $8500 (Ogden ) owner pic
Sep 10 - 2006 Chevy Cobalt - $7500 (Ogden) owner
Sep 09 - PRICE DROP! Clean 1986 Chevy C10 2WD NEW PAINT/TIRES BLACK ON BLACK - $2500 (Ogden ,Utah) owner pic
Sep 09 - 2005 Chevrolet Silverado 2500HD - $18456 (Ogden, UT) dealer img
Sep 08 - 2008 Chevrolet Silverado 1500 - $27886 (Ogden, UT) dealer img
Sep 05 - 1969 chevy c-10 with air ride - $5500 (smithfield) owner pic
Aug 26 - 2003 Chevy S10 - $6750 (North Salt Lake) dealer pic
Results For: provo Found 13 Instances of chevy truck
Sep 16 - 2004 4x4 Chevy Silverado 1500 LS - $9700 (American Fork) owner pic
Sep 14 - 1963 chevy pick up $800 obo - $800 (EAGLE MOUNTIAN) owner pic
Sep 13 - Chevy Flatbed Truck - $1300 (Orem) owner pic
Sep 07 - Trade or Sell My Lincoln Continental For your TRUCK - $2900 (Heber City) owner pic
Aug 31 - '77 chevy C30 spray truck - $5000 (spring city) owner
Aug 30 - 82 Chevy Truck/Camper - $3000 (Spanish Fork) owner pic
Aug 27 - Chevrolet 2500 HD Extended Cab - $7800 (Provo/Orem) owner pic
Aug 26 - 2003 Chevy S10 - $6750 (North Salt Lake) dealer pic
Aug 20 - 1975 Chevy truck - $8500 (American Fork) owner pic
Aug 20 - 1963 Chevy Truck - $1000 (Saratoga Springs, UT) owner pic
Results For: saltlakecity Found 52 Instances of chevy truck
Sep 18 - 2003 CHEVY 2500HD Crew Cab Silverado SWB 4x4 - #10722 - $14950 (CAR BARN, Inc. - Fruita, CO) dealer img
Sep 18 - 2000 Chevy Silverado - $6700 (Springville) owner pic
Sep 18 - 2004 Chevrolet Avalanche 1500 4WD - $16450 (Ogden, ut) owner
Sep 17 - 1989 Chevrolet Truck - $5500 (SANDY) owner pic
Sep 17 - 2009 GMC Sierra Z71 4 Door / 6 Speed Auto ** PERFECT** 6,900 Miles - $32500 (Blackfoot) owner img
Sep 17 - 2006 CHEVY SILVERADO 2500 LONG BED WORK TRUCK (Stock #18889) - $12900 dealer pic
Sep 17 - 2004 CHEVY K1500 SILVERADO 4X4 **VERY CLEAN!!** - $8995 (West Jordan, UT) dealer pic
Sep 16 - 2003 Chevrolet Tahoe LT 4wd - $2851 (salt lake) dealer img
Sep 13 - 1999 Chevy Silverado, Gold with Black Interior - $4500 (So. Jordan) owner pic
Sep 11 - 1969 CHEVY TRUCK - $700 (WEST JORDAN,UT) owner
Results For: stgeorge Found 58 Instances of chevy truck
Sep 18 - 1970 Chevy Truck - Sell or Trade - $4800 (St George, UT) owner pic
Sep 18 - 1984 Chevy K5 Blazer 4x4 with only 6,970 origional miles!!!!!!!!!!!! - $7900 owner pic
Sep 17 - 2006 Cheverolet Silverado Crew Cab 1500 I NEED THIS GONE THIS WEEKEND - $12900 (Washington UT) owner img
Sep 17 - s76 Chevy stepside - $3900 (St george) owner pic
Sep 17 - * * * 03' SILVERADO 2500 HD 4 DOOR CREW 88K* * * WILL TAKE TRADE INS!! - $13000 (St. George) owner img
Sep 16 - 1995 Chevy Tahoe - $3000 (St. George) owner
Sep 16 - 2006 Chevy Colorado - $18500 (Cedar City) owner pic
Sep 16 - *2006 Chevy Silverado CREW CAB* - $13500 (Washington) owner img
Sep 15 - Chevy 1500 4x4 Pickup w/ Car Audio system - $3500 (Cedar City, UT) owner img
Sep 15 - 98 chevy silverado 4x4 - $4000 (cedar city) owner