Verdict · NHTSA data
Limited data — recalls on file
NHTSA has just 0 complaints on file for the 1978 GMC K30 — too few to judge reliability from owner reports alone — but one recall campaign applies to this year, so any used example should have its VIN checked for completed recall work.
0
NHTSA complaints
1
Recalls
0
Investigations
0
Crash-involved
0
Fires reported
0
Injuries
0
Deaths
—
NCAP overall
1 NHTSA recall campaign on file. Recall repairs are free at franchised dealers.
Defect
THE EXISTING CERTIFICATION LABELS CONTAIN INCORRECT RIM SIZE INFORMATION. THIS IS A NON-COMPLIANCE TO FEDERAL MOTOR VEHICLE SAFETY STANDARD NO. 120, "TIRE SELECTION AND RIMS FOR VEHICLES OTHER THAN PASSENGER CARS". THE EXISTING LABELS SPECIFY THE USE OF 16.5X6.00 REAR WHEELS INSTEAD OF THE CORRECT 16.5X6.75 WHEELS.
Remedy
A NEW LABEL WILL BE INSTALLED INDICATING THE CORRECT SIZE REAR WHEEL. THIS WILL BE PERFORMED FREE OF CHARGE.
The record is thin — 0 NHTSA complaints — so owner-report data can't strongly confirm reliability either way, though 1 recall should be verified as completed.
Yes — NHTSA lists 1 recall campaign affecting the 1978 GMC K30. Recall repairs are free at franchised dealers; check the VIN at nhtsa.gov/recalls to confirm the work was done.
Based on NHTSA ODI data through June 2026. Complaints are consumer-reported and unverified. Updated July 5, 2026.
Compiled by Sharon Ben-Moshe, Founder.