Chevy / GMC / Cadillac Service & Repair
Chevy, GMC and Cadillac Repair in Lewiston, Maine
Portland Performance services and repairs Chevrolet, GMC and Cadillac trucks, SUVs and cars at 1830 Lisbon St in Lewiston, for drivers across Lewiston, Auburn, Augusta, Brunswick and Topsham.
From a Silverado or Sierra to a Tahoe, Yukon or Escalade, you get accurate diagnostics, quality parts and honest recommendations.
Chevy, GMC and Cadillac problems we fix every week
- Lifter and AFM/DFM failures: ticking, misfires and collapsed lifters on 5.3 and 6.2 V8s
- 8 speed transmission shudder: diagnosis and fluid exchange on 8L45 and 8L90 transmissions
- Oil consumption and leaks: rear main seals, oil pans and valve covers
- 4x4 systems: transfer cases, front axles and actuators
- Duramax diesels: diagnosis and repair
- Rust: brake lines, fuel lines and exhaust
- Electrical: module, infotainment and charging faults
Models we see most: Silverado, Sierra, Tahoe, Suburban, Yukon, Escalade, Equinox, Traverse and Colorado
Why Chevy, GMC and Cadillac owners choose us over the dealer
Diagnosis before parts
We find the actual cause first. Most complex diagnostics and second opinions are resolved in 1 to 3 hours, which costs less than replacing parts on a guess.
OEM or equal quality parts
We prefer genuine OEM parts, or parts that match their quality, along with factory spec fluids, so every repair goes right and lasts.
Photos and video of everything
Every visit includes a free 200+ point digital inspection with photos and video sent to your phone, so you see what we see.
24 month / 24,000 mile warranty
Our workmanship warranty covers most repairs. Ask us about the details for your job.
Chevy, GMC and Cadillac services
- Factory schedule maintenance with OEM fluids and filters
- Check engine light, electrical and drivability diagnostics
- Oil leaks, cooling system and timing repairs
- Brakes, suspension, steering, tires and alignments
- Transmission, clutch and driveline service and repair
- Engine repair, replacement and builds
- Second opinions on dealer quotes
Chevy, GMC and Cadillac service FAQ
Will servicing my Chevy, GMC or Cadillac here affect the factory warranty?
No. You can have maintenance done at any qualified independent shop. We follow the factory schedule, use OEM parts and fluids, and document every visit. Every maintenance and repair visit is also reported to CARFAX, so your service history stays complete for resale, just like a dealer.
My truck shudders around 25 to 45 mph. What is that?
On many GM 8 speed transmissions that shudder comes from the transmission fluid, and a proper fluid exchange often fixes it. We diagnose it first to make sure.
Book Chevy, GMC and Cadillac service in Lewiston
Portland Performance, 1830 Lisbon St, Lewiston, ME 04240. Monday to Friday, 8:00 AM to 12:30 PM and 1:30 PM to 5:00 PM (closed for lunch 12:30 to 1:30). Secure 24/7 key drop available.
Schedule online any time, call during business hours, or send a message with questions or photos and we will get back to you.
See all service and repair, or protect the finish with ceramic coating and detailing.