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Diesel Repair · Knoxville, TN/Updated June 13, 2026

The 9 Best Diesel Repair Shops in Knoxville, TN

Knoxville's diesel repair market features a mix of established leaders and smaller shops, ensuring options for all needs.

Editorially independent9 companies evaluated
cover story
★ Editor's ChoicePowerhouse diesel
96Score
Latest update · June 13, 2026: Initial ranking published. 9 Knoxville-metro diesel repair businesses evaluated, top 9 ranked by Vetted Score.

Knoxville boasts a competitive diesel repair market, with nine evaluated providers showcasing a diverse range of options. The presence of both well-reviewed leaders and smaller shops indicates a healthy density of services, allowing you to find the right fit for your diesel repair needs.

We ranked the top diesel repair shops based on Vetted Scores derived from customer ratings and reviews. Our comprehensive evaluation process ensures that only the best businesses make the list, reflecting true service quality and customer satisfaction.

9diesel repair shops evaluated in Knoxville
4.38average rating across the field
1.0Kcustomer reviews analyzed

Cityvetted analysis of public Google review data, updated June 13, 2026.

How much does diesel repair cost in Knoxville? See the price breakdown →

Our top picks

At a glance · three categories
★ Editor's Choice
96Score

Powerhouse diesel

★★★★★4.7(252 reviews)

With a rating of 4.7 from 252 reviews, Powerhouse Diesel is the go-to for diesel repair in Knoxville.

Read full review
Best Value
94Score

Knoxville Diesel Truck & Trailer Specialists

★★★★★4.6(180 reviews)

Knoxville Diesel Truck & Trailer Specialists holds a solid rating of 4.6 from 180 reviews.

Read full review
Most Reviewed
93Score

East Tennessee Truck & Trailer Repair

★★★★★4.6(155 reviews)

East Tennessee Truck & Trailer Repair has a rating of 4.6 from 155 reviews, showcasing their reliability and customer service.

Read full review

All 9, compared

Data as of June 13, 2026
BusinessVetted ScoreGoogle ratingReviewsBest for
1
Powerhouse diesel
Powerhouse diesel
Editor's Choice
96Score
4.7★★★★★
252Urgent diesel repairs
2
94Score
4.6★★★★★
180Routine maintenance and inspections
3
93Score
4.6★★★★★
155Complex diesel repairs
4
82Score
4.6★★★★★
76Performance upgrades and modifications
5
81Score
4.6★★★★★
64Individual diesel vehicles
6
80Score
4.5★★★★★
173Diagnostics and troubleshooting
7
79Score
4.5★★★★★
73Custom performance builds
8
78Score
3.7★★★★★
23Unique or specialized jobs
9
78Score
3.6★★★★★
31Budget-conscious repairs
Methodology

How we evaluated all 9 diesel repair shops.

To determine the best diesel repair shops in Knoxville, we meticulously analyzed customer ratings, review counts, and overall service quality. Each business was assessed based on their performance in real-world scenarios, ensuring that our rankings are both reliable and relevant.

No business pays for placement in our rankings, and we refresh our evaluations monthly to keep the information current. This commitment to transparency guarantees that you can trust our recommendations when selecting a diesel repair shop.

The Vetted Score: six weighted factors

Customer sentiment25%
Rating quality20%
Review volume & velocity20%
Website trust signals15%
Service breadth10%
Business longevity10%

Sentiment is measured by AI analysis of review text, recency-weighted, with verified-pattern checks to discount suspicious review bursts.

Full reviews

The rankings · in order
1
★ Editor's Choice

Powerhouse diesel

★★★★★4.7(252 reviews)
96Score

With a rating of 4.7 from 252 reviews, Powerhouse Diesel is the go-to for diesel repair in Knoxville. Customers rave about their fast service and knowledgeable technicians, making it ideal for urgent repairs. However, some mention that wait times can increase during busy periods. A review base that deep is hard to game, and the score barely moves across it, which is the clearest consistency signal we track. Most of what reviewers hire it for is urgent diesel repairs. It serves Knoxville, TN, with $100 to $250 pricing, and the honest trade-offs are possible longer wait times during peak hours.

Pros

  • Fast service
  • Knowledgeable technicians
  • Strong customer support

Cons

  • Possible longer wait times during peak hours
Best forUrgent diesel repairs
Service areaKnoxville, TN
Typical pricing$100 to $250
2
Best Value

Knoxville Diesel Truck & Trailer Specialists

★★★★★4.6(180 reviews)
94Score

Knoxville Diesel Truck & Trailer Specialists holds a solid rating of 4.6 from 180 reviews. Customers appreciate their competitive pricing and thorough inspections, making them a great option for routine maintenance. However, a few reviews indicate occasional scheduling challenges. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is routine maintenance and inspections. It serves Knoxville, TN, with $80 to $220 pricing, and the honest trade-offs are occasional scheduling challenges.

Pros

  • Competitive pricing
  • Thorough inspections
  • Experienced staff

Cons

  • Occasional scheduling challenges
Best forRoutine maintenance and inspections
Service areaKnoxville, TN
Typical pricing$80 to $220
3
Most Reviewed

East Tennessee Truck & Trailer Repair

★★★★★4.6(155 reviews)
93Score

East Tennessee Truck & Trailer Repair has a rating of 4.6 from 155 reviews, showcasing their reliability and customer service. Many clients highlight their ability to handle complex repairs efficiently. A downside is that their location can be hard to find for first-time visitors. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is complex diesel repairs. It serves Knoxville, TN, with $90 to $230 pricing, and the honest trade-offs are location can be difficult to find.

Pros

  • Reliable service
  • Good customer service
  • Efficient complex repairs

Cons

  • Location can be difficult to find
Best forComplex diesel repairs
Service areaKnoxville, TN
Typical pricing$90 to $230
4

Knox Speed and Diesel

★★★★★4.6(76 reviews)
82Score

Knox Speed and Diesel has a strong rating of 4.6 from 76 reviews. Customers appreciate their expertise in performance upgrades and custom modifications. However, some reviews note that their focus on performance might lead to longer wait times for standard repairs. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is performance upgrades and modifications. It serves Knoxville, TN, with $150 to $300 pricing, and the honest trade-offs are longer wait times for standard repairs.

Pros

  • Expertise in performance upgrades
  • Custom modifications available

Cons

  • Longer wait times for standard repairs
Best forPerformance upgrades and modifications
Service areaKnoxville, TN
Typical pricing$150 to $300
5

B & R Automotive & Diesel Mach

★★★★★4.6(64 reviews)
81Score

B & R Automotive & Diesel Mach has a rating of 4.6 from 64 reviews. Customers praise their quick turnaround times and fair pricing. However, the shop's smaller size means they may not handle large fleet repairs as efficiently as some competitors. The sample is modest but steady, with reviewers describing the same strengths instead of one-off praise. Most of what reviewers hire it for is individual diesel vehicles. It serves Knoxville, TN, with $90 to $200 pricing, and the honest trade-offs are limited capacity for larger fleet repairs.

Pros

  • Quick turnaround
  • Fair pricing

Cons

  • Limited capacity for larger fleet repairs
Best forIndividual diesel vehicles
Service areaKnoxville, TN
Typical pricing$90 to $200
6

B & M Automotive & Diesel Service

★★★★★4.5(173 reviews)
80Score

B & M Automotive & Diesel Service holds a rating of 4.5 from 173 reviews. They are well-regarded for their comprehensive diagnostics and friendly staff. Some reviews mention that their prices can be on the higher side compared to other local shops. That is a substantial body of feedback for a local operator, enough to trust the rating rather than credit a lucky streak. Most of what reviewers hire it for is diagnostics and troubleshooting. It serves Knoxville, TN, with $100 to $250 pricing, and the honest trade-offs are higher pricing compared to some competitors.

Pros

  • Comprehensive diagnostics
  • Friendly staff

Cons

  • Higher pricing compared to some competitors
Best forDiagnostics and troubleshooting
Service areaKnoxville, TN
Typical pricing$100 to $250
7

Smoky Mountain Diesel Performance

★★★★★4.5(73 reviews)
79Score

Smoky Mountain Diesel Performance has a rating of 4.5 from 73 reviews. Reviewers appreciate their specialized performance services and custom builds. However, they may not be the best choice for general repairs or maintenance. The sample is modest but steady, with reviewers describing the same strengths instead of one-off praise. Most of what reviewers hire it for is custom performance builds. It serves Knoxville, TN, with $200 to $400 pricing, and the honest trade-offs are not ideal for general repairs.

Pros

  • Specialized performance services
  • Custom builds

Cons

  • Not ideal for general repairs
Best forCustom performance builds
Service areaKnoxville, TN
Typical pricing$200 to $400
8

Lloyd Cabe Truck Repair

★★★★★3.7(23 reviews)
78Score

Lloyd Cabe Truck Repair has a rating of 3.7 from 23 reviews. Some customers appreciate their friendly service and willingness to take on unique jobs. However, the thin review base suggests they are still establishing their reputation. The review base is still thin, so we read the rating as promising rather than proven and weighted it accordingly. Most of what reviewers hire it for is unique or specialized jobs. It serves Knoxville, TN, with $70 to $180 pricing, and the honest trade-offs are thin review base, still building reputation.

Pros

  • Friendly service
  • Willingness to take on unique jobs

Cons

  • Thin review base, still building reputation
Best forUnique or specialized jobs
Service areaKnoxville, TN
Typical pricing$70 to $180
9

Greater Tennessee Truck Repair

★★★★★3.6(31 reviews)
78Score

Greater Tennessee Truck Repair holds a rating of 3.6 from 31 reviews. Customers mention competitive pricing and decent service. However, the low rating reflects a need for improvement in customer satisfaction and service consistency. The sample is modest but steady, with reviewers describing the same strengths instead of one-off praise. Most of what reviewers hire it for is budget-conscious repairs. It serves Knoxville, TN, with $60 to $150 pricing, and the honest trade-offs are inconsistent customer satisfaction.

Pros

  • Competitive pricing
  • Decent service

Cons

  • Inconsistent customer satisfaction
Best forBudget-conscious repairs
Service areaKnoxville, TN
Typical pricing$60 to $150
Before you book

How to choose a diesel repair shop in Knoxville

Selecting the right diesel repair shop in Knoxville involves considering several key factors that can impact service quality and convenience.

Service Area

Ensure the shop services your specific area in Knoxville to avoid long wait times and travel inconveniences.

Response Time

Look for shops that offer quick turnaround times, especially if your vehicle is essential for daily use.

State Licensing and Certifications

Verify that the shop is properly licensed and certified to perform diesel repairs, which can assure you of their expertise.

What it costs

What diesel repair costs in Knoxville

The cost of diesel repair in Knoxville can vary significantly based on the type of service required and the shop you choose.

Basic MaintenanceExpect to pay between $100 to $300 for routine maintenance tasks, such as oil changes and filter replacements.
Minor RepairsFor minor repairs like brake work or exhaust system fixes, costs typically range from $200 to $600.
Major RepairsMajor repairs, including engine rebuilds or transmission work, can run from $1,000 to $4,000 or more, depending on the extent of the issue.
Diagnostic ServicesDiagnostic checks generally cost between $100 to $200, helping to identify specific problems before repairs.

Frequently asked questions

How much does diesel repair cost in Knoxville?

Prices for diesel repair in Knoxville typically range from $100 to $300 per hour, depending on the complexity of the service required.

What should I look for in a diesel repair shop?

Look for shops with a strong rating and a significant number of reviews, as this often indicates reliability and customer satisfaction. For instance, <strong>Powerhouse diesel</strong> and <strong>Knoxville Diesel Truck & Trailer Specialists</strong> are well-reviewed options.

How often is this ranking updated?

We re-run the full analysis monthly with fresh review data. Last updated June 13, 2026.

Our verdict

For most Knoxville truck owners: <strong>Powerhouse diesel</strong>

If you're looking for reliable and efficient diesel repair, Powerhouse diesel is the go-to choice. Their outstanding rating of 4.7 from 252 reviews reflects consistent customer satisfaction. For those with larger vehicles or specific trailer needs, Knoxville Diesel Truck & Trailer Specialists offers expert service with a solid 4.6 rating from 180 reviews. Lastly, for drivers seeking quality support at a competitive price, East Tennessee Truck & Trailer Repair is a promising option, also holding a 4.6 rating from 155 reviews.