Grizzly RV Service
Grizzly RV Service is a mobile RV tech based in Edinburg, Texas.
The pin is Edinburg, not an address. Super Mario's Diesel Road Services works from a vehicle and comes to you.
Super Mario's Diesel Road Services is a mobile diesel mechanic based in Edinburg, Texas, and it comes to you, whether you are broken down on the highway or parked at an RV park. When you call, you talk directly to the owner, Mario Pena Jr, and he is the one who drives out and does the work.
It works on RV and motorhome chassis, including Spartan, Freightliner, Workhorse and Ford. On the road service side it handles brakes, leveling jacks and hydraulic issues, no-start and fuel problems, water pumps, alternators, starters, wheel seals, belts and tensioners, A/C and heating, electrical troubleshooting, computer diagnostics, welding and fabrication, trailer repairs, driveline, exhaust and suspension work. A rig that will not release its brakes or raise its jacks after months in an RV park is exactly the kind of call it describes handling on location.
No trip fee, hourly rate or diagnostic fee is published, so ask about the trip fee when you call. It advertises "24 HOUR ROADSIDE SERVICE" and lists its hours as Monday to Sunday, 24 hours.
Mario has "over 20 years experience in road service field" and is a certified state inspector for the State of Texas for state inspections, which means he knows what a DOT check looks for before you get pulled over for it. The service area is described as serving "all of South Texas," though no specific radius is stated.
Google rates it 4.9 stars from 155 reviews.
This is a good fit for a traveler whose RV chassis quits somewhere in South Texas, or an owner parked for a while who needs brake, jack or hydraulic work done without towing the rig anywhere.
| Based in | Edinburg, TexasMobile: comes to the RV |
|---|---|
| Service area | “Mario Pena Jr is ready to serve all of South Texas”smdieselroadservices.com |
| Trip fee and hourly rate | |
| Hours | Monday to Sunday 24 Hourssmdieselroadservices.com; takes after-hours and emergency calls |
| Works on | GeneratorsSlide-outs and levelingElectrical, inverters and convertersPlumbing and water systemsChassis, brakes and tiresListed at smdieselroadservices.com. This is what they list, not a limit; ask about anything else. |
| Certifications | |
| Listed as | “brakes; leveling jacks; hydraulic issues; diesel engine; water pumps; oil pan gasket; injector replacement; fuel pump replacement; oil pump replacement; belts; tensioners; radiator replacement; alternator; starter; shocks; wheel seals; brake adjustment; heating; ABS system; electrical; fuel system; computer diagnostics; welding and fabrications; trailer repairs; driveline; exhaust; suspension; ste” |
| Time in business | “over 20 years experience in road service field” |
| Google rating | 4.9 of 5, 155 reviewsGoogle Maps listing, read October 8, 2026 |
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