P0700 on CHEVROLET TAHOE — Transmission Control System (MIL Request)

Q: "What does P0700 mean on a CHEVROLET TAHOE?"

"P0700 indicates: Transmission Control System (MIL Request). This is a transmission code. 5 CHEVROLET TAHOE owners have reported this to NHTSA."

Q: "What are the most common causes of P0700 on CHEVROLET TAHOE?"

"Based on 5 NHTSA reports, the most commonly cited components are: Power Train,Electrical System,Engine, Power Train. These percentages are based on the component field in owner complaints."

Q: "Is P0700 serious on my CHEVROLET TAHOE?"

"Of 5 NHTSA reports for this code on CHEVROLET TAHOE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic."

Q: "What should I do if my CHEVROLET TAHOE shows P0700?"

"1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare."

What P0700 Means on Your CHEVROLET TAHOE

P0700 is a diagnostic trouble code indicating: Transmission Control System (MIL Request). This code relates to the transmission system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

5 CHEVROLET TAHOE owners have reported this issue to NHTSA across model years 2017-2022. Most reports come from the 2021, 2017 model years. The most commonly reported component is Power Train,Electrical System,Engine (60.0% of reports).

Real CHEVROLET TAHOE Owner Reports

Source: NHTSA Complaints Database

"About 3 weeks ago my vehicle began shuddering during acceleration only at low speeds, and I had an appointment to regularly scheduled maintenance next week and planned to have the dealer look at it during that appointment."

— 2017 CHEVROLET TAHOE owner · POWER TRAIN · Filed 09/26/2022

"The affected components are the electrical system, engine, and power train. In March 2025, my 2021 Chevrolet Tahoe displayed multiple warning lamps across the dash, including traction control and check engine lights. The vehicle shifted erratically and sometimes entered limp mode."

— 2021 CHEVROLET TAHOE owner · POWER TRAIN,ELECTRICAL SYSTEM,ENGINE · Filed 07/10/2025

"The affected systems are the power train, engine, and electrical. My 2021 Chevrolet Tahoe experienced failures consistent with GM Technical Service Bulletin 21-NA-149 (engine wiring harness chafing) and the conditions outlined in Recall N232404190 (valve body failure, November 2024)."

— 2021 CHEVROLET TAHOE owner · POWER TRAIN,ELECTRICAL SYSTEM,ENGINE · Filed 07/09/2025

"On 01/03/24, the vehicle stalled and smoked on the Suncoast Parkway. All dashboard warning lights and messages illuminated, and the vehicle entered emergency park mode. OnStar was contacted and the vehicle was towed to Jenkins Chevrolet in Homosassa, FL."

— 2021 CHEVROLET TAHOE owner · POWER TRAIN,ELECTRICAL SYSTEM,ENGINE · Filed 07/14/2025

"Car went to limp mode, hard shifting very suddenly. Transmission system failed. No reverse. Computer codes p0700 p0777 p18A1 inspected at Chevy service center and needs valve body replacement. No warnings, lights, alerts, hard shifts previously."

— 2022 CHEVROLET TAHOE owner · POWER TRAIN · Filed 12/17/2025

All reports filed by vehicle owners directly with the U.S. Department of Transportation.

📊 Complaint Trend by Model Year

1

'17

3

'21

1

'22

Common Causes on CHEVROLET TAHOE

Based on NHTSA complaint component analysis for this vehicle.

POWER TRAIN,ELECTRICAL SYSTEM,ENGINE 60%

POWER TRAIN 40%

What To Do Next

1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. If your vehicle is covered, repairs are free.
2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50–$150) pinpoints the root cause before you spend money on parts.
3
Compare repair quotes
Get 2–3 quotes. Dealer vs. independent shop prices often differ 30–50% for the same repair.

Frequently Asked Questions

What does P0700 mean on a CHEVROLET TAHOE? ▾

P0700 indicates: Transmission Control System (MIL Request). This is a transmission code. 5 CHEVROLET TAHOE owners have reported this to NHTSA.

What are the most common causes of P0700 on CHEVROLET TAHOE? ▾

Based on 5 NHTSA reports, the most commonly cited components are: Power Train,Electrical System,Engine, Power Train. These percentages are based on the component field in owner complaints.

Is P0700 serious on my CHEVROLET TAHOE? ▾

Of 5 NHTSA reports for this code on CHEVROLET TAHOE, none involved a crash or fire. However, any diagnostic code should be evaluated by a qualified mechanic.

What should I do if my CHEVROLET TAHOE shows P0700? ▾

1) Check for recalls on your VIN at nhtsa.gov/recalls. 2) Get a professional diagnosis — a code alone doesn't identify the exact failed part. 3) Get 2-3 repair estimates to compare.