LP-25 Constant Load Leveler Helper Spring LP-25 Constant Load Leveler Helper Spring; 2500 lbs. Capacity; 3 Leaf Stack; Do Not Use w/Factory Overload Contact Springs;Mounting Hardware is sold separately. CHEVROLET GMC C3500 PICKUP K3500 PICKUP R3500 PICKUP SIERRA 1500 SIERRA 1500 HD SILVERADO 1500 SILVERADO 1500 HD V3500 PICKUP BASE CHEYENNE HIGH SIERRA HT HYBRID LS LT LTZ SCOTTSDALE SIERRA SIERRA CLASSIC SIERRA SL SIERRA SLE SIERRA SLT SIERRA SLX SIERRA XC SILVERADO SL SLE SLT WT Z71 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 4.3L (262) Vortec 4.3L L35 (262) Vortec 4.3L LU3 (262) Vortec 4.8L (292) 4.8L GEN III LR4 Vortec (294) 4.8L GEN IV LY2 Vortec (294) 5.3L GEN III Electric/Gas LM7 (325) 5.3L GEN III Flex L59 Vortec (325) 5.3L GEN III L33 Vortec (325) 5.3L GEN III LM7 Vortec (325) 5.3L GEN IV Flex LC9 Vortec (325) 5.3L GEN IV Flex LMG Vortec (325) 5.3L GEN IV LH6 Vortec (325) 5.3L GEN IV LY5 Vortec (325) 5.7L (350) 5.7L (350) Vortec 5.7L L05 (350) 5.7L L31 (350) Vortec 6.2L Diesel LL4 (379) 6.5L Turbocharged Diesel L56 (395) 6.5L Turbocharged Diesel L65 (395) 6L GEN III LQ4 Vortec (364) 6L GEN III LQ9 HO Vortec (364) 6L GEN IV L76 Vortec (364) 7.4L Chevy Big Block (454) 7.4L L19 (454) 7.4L L29 Vortec (454) CNG DIESEL ELECTRIC/GAS FLEX GAS Hellwig Hellwig LP-25 Constant Load Leveler Helper Spring - 9515 9515 Leaf Spring Helper