Square Body K5 Blazer years to avoid, and the best years to buy
Every Chevrolet K5 Blazer (1973–1991) model year: which ones owners and specialists recommend, which have documented problems, which carry recalls, and what they sell for now.
It depends on what you want. The 1973–75 trucks have the fully open body, which MotorTrend calls the K5's sweet spot for that reason, and 1976–80 trucks are the classic half-cab with the NP205 or NP203 and simpler mechanicals. For a truck to drive, CK5 owners mostly point to the 1987–91 trucks for throttle-body injection, and many name 1989–91 as the best of those for the NP241 transfer case, 30-spline axle shafts and the updated 700R4. Others prefer 1990–91 for the electronic speedometer. Whatever the year, check the frame at the steering box.
At a glance
Square Body K5 Blazer year by year
| YEAR | VERDICT | WHAT CHANGED |
|---|---|---|
| 1973 | — | 'Rounded Line' square body launches. The truck is 7 in longer overall on a 2.5-in longer wheelbase. The body is fully open behind the windshield, with a removable hardtop or convertible top. NP205 part-time or NP203 full-time 4WD; Dana 44 front, 12-bolt rear. Tilt wheel optional |
| 1975 | — | 400 V8 joins the K-series engine list. Chevrolet adds the Scottsdale and Silverado trims, and Silverado becomes the top trim. Catalytic converters on trucks under 6,000 lb GVWR |
| 1976 | — | Half-cab body with a fixed steel roof over the front seats and a removable rear top, through 1991. Blazer Chalet / Jimmy Casa Grande camper (1976–77, about 1,800 built) |
| 1977 | — | GM corporate 10-bolt front axle phased in alongside the Dana 44. Power windows and locks offered for the first time |
| 1980 | — | Full-time 4WD (NP203) dropped from K-series. NP205s get a slip-yoke rear output |
| 1981 | — | Facelift with available stacked square headlamps and reduced weight. NP208 shift-on-the-fly transfer case and automatic locking hubs |
| 1982 | — | 6.2 L diesel V8 (130 hp / 240 lb-ft at launch). 700R4 four-speed overdrive automatic available |
| 1983 | — | S-10 Blazer arrives, so the big truck becomes the 'Full-Size Blazer' and the 'K-Jimmy'. M1009 CUCV production begins (1983–87). The 250 six, standard through 1982, is no longer the base engine |
| 1987 | Sweet spot | Throttle-body injection on all gas engines, and the 350 becomes the standard engine. The trucks become the R/V series (V10 Blazer, V-Jimmy) as GMT400 pickups take the C/K name. In CK5 threads on which year to buy, most owners point to these 1987–91 TBI trucks for drivability and fuel economy |
| 1988 | — | K5 emblems dropped; fender-mounted mast antenna replaces the windshield antenna; trip odometer |
| 1989 | Sweet spot | GMT400-style grille; NP241 transfer case; 30-spline 10-bolt axle shafts; serpentine belt on the 5.7. Cheyenne returns as the base Chevrolet trim. CK5 owners rate 1989–91 as the best of the TBI trucks for the NP241, the 30-spline shafts and the updated 700R4 |
| 1990 | — | Rear-wheel anti-lock brakes, electronic speedometer, double-sided galvanized exterior panels, rear three-point belts |
| 1991 | — | Final year. 700R4 renamed 4L60; CS130 alternator. Replaced for 1992 by the GMT400 Blazer and GMC Yukon |
“Sweet spot” means owners and specialists recommend those years; “Beware” means documented problems; “Recall” means check the recall was done rather than walk away.
What a Square Body K5 Blazer costs (October 2026)
Prices depend more on the build than the year. Clean stock trucks bring steady money, M1009s are the cheap way into a diesel K5, and LS-swapped restomods take the top results.
| Project / needs work | $4.5k–15k |
|---|---|
| Driver | $15k–30k |
| Excellent / original | $35k–80k |
| Restomod (LS / Vortec) | $22k–130k |
Based on the 15 most recent Bring a Trailer sales of 1973–91 K5 Blazers (August–October 2026): $4,600 to $130,000, median $29,500. Stock trucks mostly sold for $15,000–38,500, a 1991 Silverado brought $80,000, a 1984 M1009 sold for $20,500, and an LSA-powered 1973 set the top at $130,000. Nine more trucks were bid to between $8,800 and $68,000 without selling.
Recalls by year
- Rear brake drum balance weights can loosen aluminum wheels ↗ 1982
- Composite front brake rotors can separate from corrosion ↗ 1988–1991 (Blazer listed for 1988–92)
Best years are buyer consensus from owners, specialists and forums, not spec sheets. See all K5 Blazer years to avoid across every generation.