2020 Chevrolet Blazer · symptom sheet
"Shift to Park" or "Service Shifter" warning comes on
- 30owner reports
- $506median quote
- 0involved a crash
Newest report Sep 11, 2026 · checked Sep 29, 2026
207 of the 219 complaints on this car are about the electrical system. 30 of those describe shift to park warning.
Tick what matches of 30 reports
Shift to park warning on other Blazer years
Report counts are for each model year on its own, so a newer car has had less time to collect them. Model years with too few reports of it for a sheet: 2021.
What this problem usually is
This sheet covers a dash message that says "Shift to Park" or "Service Shifter" when the car is already in Park, or when it's sitting in Drive with the shifter lights glowing. Owners say it won't let them turn the car off, or it flashes up on the highway.
What got replaced
Owners who name the part that was replaced mention the shifter assembly (4 reports) and the park switch or range sensor (4 reports).
Recalls and investigations
One recall on the electrical system covers the 2020 model year. A recall on the same system isn't always the same failure, so read the defect text.
The start/stop accumulator endcap may have missing bolts.
All 3 recalls on the 2020 Chevrolet Blazer, with the owner complaints on each recalled system
NHTSA investigations into the electrical system on the Blazer
Upper control arm ball joint breakage. Closed jul 30, 1999.
Engine compartment fires. Closed jul 31, 1996.
Fire in dash/instrum.clstr. Closed sep 14, 1994.
Elect. failures/fires. Closed jul 16, 1987.
None of these investigations covers the 2020 model year.
What owners paid
5 of the 30 reports quote a price. Each dot is one quote. The middle half runs $300 to $700.
When it happens
Too few of these reports state a mileage to give a range.
What owners wrote
“When I try to park the car, it says shift to park. Sometimes I canât get the car to go into park to exit the vehicle or other times. Iâve shut the door and it has stayed on with the accessories because it wonât shut off”
Filed Oct 15, 2025
“Shift to park message on display when car is already in park, preventing the car from turning off completely draining the battery completely.”
Filed Oct 15, 2025
“SHIFT TO Park WARNING COMES ON WHEN CAR IS IN PARK, car electrical will not shut off until the shifter is shaken or car is turned back on and shifted into gear and back to park, may take several times”
Filed Sep 9, 2025
“Shit to Park issue. Whenever I put my 2020 Chevy Blazer into park I get a "Shift to Park" error and the car will not turn off. I have to jiggle the shifter and hope that the vehicle appropriately engages into a park mode so I am able to turn the vehicle off. From doing a lot of research I have ascertaioned this is a KNOWN PROBLEM to GM. I URGE AN IMMEDIATE RECALL for these GM vehicles so this issue can be fixed.”
Filed Jul 22, 2024
Should you keep driving it?
This page can't tell you that. 0 of 30 reports involved a crash and 1 people were hurt. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Paid for this repair before a recall covered it? How recall reimbursement works
Other problems on this car
- Engine overheats or leaks coolant 48 reports
- A/C blows warm or the compressor fails 43 reports
- Power steering cuts out or goes heavy 35 reports
- Check engine light or misfire 35 reports
- Infotainment, screen or backup camera fails 29 reports