Crumptons Speed Shop

Crumptons Speed Shop We specialize in the GM powerhouse LS/LT platform and their workhorse diesel platforms as well. We do anything from basic repairs to complete builds.

Cummins certified

2018 silverado in for a rough coldstart missfire, some oil leaks and multiple random electrical issues. Rough coldstart ...
03/19/2026

2018 silverado in for a rough coldstart missfire, some oil leaks and multiple random electrical issues. Rough coldstart is a common issue on them due to failing injectors, so truck got 8 new oem injectors, new HPFP, plugs and wires and new oil cooler lines. Also found all the electrical issues to be a loose ground on the back of the driver side cylinder head that someone had left loose.

Last minute engine issue a few days before leaving for flordia. Had to take our personal shop truck apart for a camshaft...
03/09/2026

Last minute engine issue a few days before leaving for flordia. Had to take our personal shop truck apart for a camshaft / lifter issue. But thankfully parts were available for overnight shipping and a top notch machine shop Hamm's Machine Shop, we were able to get it fixed back up in just a few days.

Low milage cream puff in to replace a leaking selector shaft seal on the side of the transmission, along with a few othe...
03/08/2026

Low milage cream puff in to replace a leaking selector shaft seal on the side of the transmission, along with a few other small items to be repaired

2017 chevrolet cruze in for a new turbo.
03/08/2026

2017 chevrolet cruze in for a new turbo.

2019 ram 3500 in to delete the factory grid heater to prevent possible issues down the road of the heater nut falling in...
03/08/2026

2019 ram 3500 in to delete the factory grid heater to prevent possible issues down the road of the heater nut falling into cylinder
6

This month's 68rfe job, with 2 more sitting outside waiting their turn
03/08/2026

This month's 68rfe job, with 2 more sitting outside waiting their turn

2006 duramax in for multiple 5v refrence issues. This has been a re occurring problem with this truck over the last year...
03/08/2026

2006 duramax in for multiple 5v refrence issues. This has been a re occurring problem with this truck over the last year or so. So I decided to rip the entire engine harness, fuse box and all jumper harnesses out of the truck and ohm and load test all 5v circuits etc and repair all the damaged spots in the wiring. Finished it off with re looming / taping up the harness due to 70% of the original loom being dry rotted and missing, causing multiple bare wires rubbing in different locations.

2005 ford F350 in with several electrical issues. Had to cut out roughly 36 soldered joints and properly reconnect them ...
03/08/2026

2005 ford F350 in with several electrical issues. Had to cut out roughly 36 soldered joints and properly reconnect them with the proper un insulated connectors and good heat shrink. Also ended up having to replace an ecm connector and all pins due to the driver side battery tray being broke and bouncing up and down on the harness.

2018 ram 4500 in for a busted heatercore and some abs dash lights on.
03/08/2026

2018 ram 4500 in for a busted heatercore and some abs dash lights on.

Another monthly 68rfe rebuild job
03/08/2026

Another monthly 68rfe rebuild job

Low milage Avalanche in for a used low milage engine replacement. Original engine decided it didn't want to work anymore
03/08/2026

Low milage Avalanche in for a used low milage engine replacement. Original engine decided it didn't want to work anymore

Address

Lexington, SC

Opening Hours

Monday 9am - 5pm
Tuesday 9am - 5pm
Wednesday 9am - 5pm
Thursday 9am - 5pm
Friday 9am - 5pm
Saturday 9am - 5pm

Telephone

+18033313510

Website

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