2020 Chevrolet Blazer Electrical System Problems
NHTSA component category: ELECTRICAL SYSTEM · data through 07/14/2026
Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
How electrical system ranks on this vehicle
Share of the 211 complaints citing each category; one complaint can cite several. Full breakdown on the 2020 Chevrolet Blazer overview page.
What owners report
“Coolant temperature would not read, steering assist malfunctioning, air conditioner intermittent. Wiring harness for sensors loomed together with coil pack wiring interrupting signals.”NHTSA complaint 11655693 — filed 04/20/2025
“COMMON ISSUE, The steering assist is reduced and temp gauge is stuck on C. This either a thermostat or temp sensor issue.”NHTSA complaint 11651005 — filed 03/27/2025
“We have experienced 2 issues that are very well known issues, I will list them here. First, is the Shift to Park issue, that involves…”NHTSA complaint 11628254 — filed 12/02/2024
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Electrical System complaints by year filed
Frequently asked questions
Does the 2020 Chevrolet Blazer have electrical system problems?
Electrical System is the most-reported problem area on the 2020 Chevrolet Blazer: 71 of 211 complaints on file (33.6%). Complaints are unverified owner reports, not confirmed defects.
How many complaints does the 2020 Chevrolet Blazer have in total?
211 complaints were on file with NHTSA as of 07/14/2026. Across all categories, 5 involved a crash, 0 involved a fire, 7 reported injuries, and none reported deaths.
What does NHTSA's electrical system category include?
NHTSA assigns each complaint to standard component categories; this page reports the ELECTRICAL SYSTEM category exactly as NHTSA defines and records it.
