2005 Chevrolet Silverado 1500 4x4 Z71 4 Door Extended Cab on 2040-cars

2005 Chevrolet Silverado 1500 Z71 4 door Extended Cab. 121901 miles, may change as it is being used. Great condition inside and out. Vehicle has been well cared for and serviced extensively. Both drive axles just serviced with Mobil 1 synthetic and transfer case fluid changed with recommended GM synthetic. I have only used Mobil 1 synthetic in the engine since I have owned it. All servicing has been performed. Needs Nothing. Recently replaced the factory rims with 2012 Z71 factory 18 inch wheels and tires that were brand new. New Shock absorbers Just installed less than 100 miles ago along with a 4 wheel alignment.Some pictures show old stock rims that have been replaced.Bed liner, step rail, truck has a large amount of options from push button 4 wheel drive, XM satellite radio cd, steering wheel controls, etc. Good running and good looking truck that is in excellent condition. Bring your mechanic. Get here and don't like it after purchase, just walk away . No worries. I reserve the right to end auction at any time including the last 12 hours since the truck is for sale locally. Please contact with any questions.Thank you!     This truck is equipped with the 5.3 L33 310 hp engine. Information for it  RPO L33 FOR CHEVROLET SILVERADO AND GMC SIERRA
The Gen III Vortec 5300 is available in a new lighter, higher output variant optional on some 2005 Silverados and Sierras. RPO L33 will be introduced in short bed, extended cab versions of these pickups. The L33 features an aluminum engine block, new cylinder heads and a high-lift cam. Torque will increase, and horsepower is expected to exceed 300 in final production trim.

One of the L33’s distinguishing features is its engine block. As with the 2004 LM4 Vortec 5300, the L33’s foundation is a cast-aluminum block with pressed-in iron cylinder liners, similar to the block used for GM Powertrain’s LS1 and LS6 car V-8s. The L33 block is exceptionally light; as a result, a fully dressed L33 is 100 pounds lighter than cast iron-block Vortec 5300s (RPOs LM7 and L59).

The L33 takes its cylinder heads from the LS6. Originally developed for the Z06 Corvette, these heads improve airflow in and out of the engine. With their pent-roof combustions chambers and new flat top pistons (the pistons in other Gen III Vortec 5300s have a slight sump in the piston deck), the L33’s compression ratio increases from 9.5:1 to 9.9:1. This increase improves the engine’s volumetric efficiency yet still allows it to achieve full power with regular grade gasoline.

Finally, the L33 is equipped with a higher-lift camshaft. Maximum valve lift increases from 11.6 mm on the LM7 and L59 to 12.5 mm. The new cam and compression ratio are the primary sources of the L33’s increased horsepower.

The L33 camshaft and cylinder heads were developed in conjunction with the new Gen IV Vortec 5300 (RPO LH6). The design objective was more horsepower for customers who need it, without requiring a step up to the Vortec 6000 (and an increase in operational costs). RPO L33 expands GM Powertrain’s lineup of Vortec V8s and gives GM’s truck customers even more flexibility and choice.

The L33 Vortec 5300 will be built at Powertrain’s Romulus, Mich., engine plant.