Looking for in-stock aftermarket parts to modify or upgrade your 2003 GMC Sierra 3500 with injection pumps & controllers? At Tunersports.com we carry a huge selection of the top name brand performance injection pumps & controller parts and accessories for your Sierra 3500.
Whether you have a 2003 GMC Sierra 3500 in Base to SLT trim we have you covered. We have 6 injection pumps & controllers available to mod your Sierra 3500. All parts have free shipping to the Continental US 48 States.
 IN STOCK 1050110We have been rebuilding injection systems since 1972; Factory trained by the best, we abide by high quality and production standards; Our Injection team is focused on producing consistent quality utilizing the highest quality parts available; We utilize world class calibration equipment and pride ou... BD Diesel Injection Pump Stock Exchange CP3 - Chevy 2001-2004 Duramax 6.6L LB7 2001-2004 GMC Sierra 3500 SLE / SLT 2002-2004 GMC Sierra 3500 Base $1,108.07 |
 IN STOCK - LOW FPE-DMAX-CP3-10MMThe Fleece Performance Duramax 10mm stroker CP3 is a straight forward, no inflated numbers, CP3 upgrade proven to support 750 RWHP with the proper complimenting modifications. Not only will it support 750 RWHP, but it also eliminates the factory fuel flow restiction that begins at 3,000 RPM. If you ... Fleece Performance 01-13 GM Duramax 6.6L Duramax PowerFlo 750 CP3 (LBZ/LMM Based) 2001-2006 GMC Sierra 3500 SLE / SLT 2002-2005 GMC Sierra 3500 Base $2,001.01 |
 IN STOCK - DROPSHIPS FPE-DMAX-CP3KThe Fleece Performance CP3K is a modified Duramax LBZ CP3 designed to eliminate the factory fuel flow restriction that begins at 3,000 RPM. If you have a stock CP3 pump you are losing fuel flow and rail pressure after 3000 RPM, which correlates to lost horsepower when you need it most. This cost eff... Fleece Performance 01-13 GM Duramax 6.6L Duramax CP3K (LBZ/LMM Based) 2001-2006 GMC Sierra 3500 SLE / SLT 2002-2005 GMC Sierra 3500 Base $1,308.01 |