C1 - 1953-1962
C2 - 1963-1967
C3 - 1968-19821975 Corvette
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The 1975 model year would be a pilotable year for a couple of reasons. First, it would be the last year (until the 1986 model year) a convertible, or roadster, would be offered as a body style; second, only two 350-cid engines were offered, the 165-hp base 350 engine and the optional L82 205-hp 350 engine. Catalytic converters were introduced this year. Dual exhausts were routed to a single converter then split for dual exit.
The front and rear soft bumpers were structurally redesigned. The rear bumper was now a 1-piece unit and had inner shock absorbers for impact. High energy ignition (HEI) made its debut which required the tachometer to be electronically driven. The one optional engine, the 205-hp L82 engine got its own hood emblem. Kilometers per hour (KPH) speedometer surfaces appeared on the Corvette's speedometer for the first time and 1975 was the first year with a headlight-warning buzzer.
The base price of both the coupe and convertible increased significantly in 1975; the coupe from $6,001.50 to $6,797.10 and the convertible from $5,765.50 to $6,550.10.
1975 total Corvettes built - 38,465
1975 Coupes - 33,836
1975 Convertibles - 4,629
| Serial Numbers | |
| Corvette | 1Zx7y5S400001-1Zx7y5S438465 |
| Coupe is body style 37 and convertible is body
style 67 in "x" position Engine code is either "J" for the base 350-cid engine or "T" for the RPO L82 350-cid engine in the "y" position. |
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Engine Identification
| Position | Character(s) | Description |
| 1 | V | Flint, MI. engine assembly plant |
| 2 to 5 | 1025 | Engine assembly date (month/day) |
| 6 and 7 | Code | CHC - 350-cid 205-hp, manual transmission CHR - 350-cid 205-hp, automatic transmission, California emissions CKC - 350-cid 205-hp, automatic transmission CRL - 350-cid 205-hp, manual transmission CRM - 350-cid 205-hp, automatic transmission CUD - 350-cid 205-hp, manual transmission CUT - 350-cid 205-hp, manual transmission |
| All engines were equipped with a single 4-bbl
carburetor. Data are from GM's own Information Kit and some engines may or may not have made production. |
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Engine Specifications - 350 engines
| Item | Base L48 | RPO L82 |
| Displacement | 350 cid | 350 cid |
| Bore & Stroke | 4.00" x 3.48" | 4.00" x 3.48" |
| Compression Ratio | 8.5:1 | 9.0:1 |
| Advertised Horsepower | 165 hp @ 3800 rpm | 205 hp @ 4800 |
| Torque | 255 lb-ft @ 2400 rpm | 255 Lb-ft @ 3600 |
| Valve lifter type | Hydraulic | Hydraulic |
| Fuel system | Rochester 4-bbl 7045223 - Manual 7045222 - Automatic |
Rochester 4-bbl 7045211 - Manual 7045210 - Automatic |
Regular Production Options
| RPO | Description | Cost | Units | % (1) |
| 1YZ37 | Coupe | $6,797.10 | 33,836 | 88.0 |
| 1YZ67 | Convertible | $6,550.10 | 4,629 | 12.0 |
| --- | Custom interior trim | $154.00 | n/a | n/a |
| A31 | Power windows | $93.00 | 28,745 | 74.7 |
| A85 | Custom shoulder belts (standard with the coupe) (1) | $41.00 | 646 | 14.0 |
| C07 | Auxiliary hardtop (convertible only) (1) | $267.00 | 2,407 | 52.0 |
| C08 | Soft trim roof cover for auxiliary hardtop (1) | $350.00 | 279 | 11.6 |
| C50 | Rear window defroster | $46.00 | 13,760 | 35.8 |
| C60 | Air conditioning | $490.00 | 31,914 | 83.0 |
| FE7 | Gymkhana suspension | $7.00 | 3,194 | 11.3 |
| GV7 | Optional rear axle | $12.00 | 1,969 | 5.1 |
| J50 | Power brakes | $55.00 | 35,842 | 93.2 |
| L82 | 350-cid, 205-hp | $336.00 | 2,372 | 6.2 |
| M21 | Close ratio 4-speed transmission (2) | $0.00 | 1,057 | 44.6 |
| M40 | Turbo Hydra-Matic 3-speed automatic transmission (3) | $0.00 | 28,473 | 74.0 |
| N37 | Tilt-telescopic steering column | $82.00 | 31,830 | 82.8 |
| N41 | Power steering | $129.00 | 37,591 | 97.7 |
| QRM | GR70 x 15 white stripe belted tires | $35.00 | 5,233 | 13.6 |
| QRZ | GR70 x 15 white letter belted tired | $48.00 | 30,407 | 79.1 |
| U05 | Dual horns | $4.00 | 22,011 | 57.2 |
| U58 | AM/FM stereo radio | $284.00 | 24,701 | 64.2 |
| U69 | AM/FM radio | $178.00 | 12.902 | 33.5 |
| UA1 | Heavy duty battery | $15.00 | 16,778 | 43.6 |
| UF1 | Rearview mirror map light | $5.00 | 21,676 | 56.4 |
| YF5 | California emission test | $20.00 | 3,037 | 7.9 |
| Z07 | Off road suspension and brake package (4) | $400.00 | 144 | 0.4 |
| (1) Percentages are calculated on
the number of options sold vs. the number possible. For example,
C08 was only available on the Auxiliary Hardtop so the 11.6%
reflects the number of Auxiliary Hardtops (2,407) ordered with
the C08 option (279). (2) The M21 was standard and only available with the Z07/L82 while the M20 was standard with the base 350-cid, 165-hp engine. (3) The M40 was no cost with the base 350-cid, 190-hp engine but $120 with the RPO L82 engine. (4) RPO Z07 was only available with L82 (2,372) engine option - not available with M40 transmission so percentage is probably less than 0.4%. >> RPO C08 was only available in black. >> RPO FE7 was included with RPO Z07 but could be ordered separately with either 350-cid engine. >> Convertible folding tops were limited to choices of black or white. |
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1975 Exterior/Interior Colors
| Paint Code | Color (Quantity) | Interior Color Choices * |
| 10 | Classic White (8,007) | Black - Dark Blue - Dark Red - Medium Saddle - Neutral - Silver |
| 13 | Silver (4,710) | Black - Dark Blue - Dark Red - Medium Saddle - Silver |
| 22 | Bright Blue (2,869) | Black - Dark Blue - Silver |
| 27 | Steel Blue (1,268) | Black - Dark Blue - Silver |
| 42 | Bright Green (1,664) | Black - Medium Saddle - Neutral - Silver |
| 56 | Bright Yellow (2,883) | Black - Medium Saddle - Neutral |
| 67 | Medium Saddle (3,403) | Black - Medium Saddle - Neutral |
| 70 | Orange Flame (3,030) | Black - Medium Saddle - Neutral |
| 74 | Dark Red (3,342) | Black - Dark Red - Medium Saddle - Neutral - Silver |
| 76 | Mille Miglia Red (3,355) | Black - Dark Red - Medium Saddle - Neutral - Silver |
| The exterior/interior combinations are suggested
combinations that would be attractive to the average customer.
Orders for non-recommended combinations for the coupe models
may be submitted provided the dealer initials the appropriate
order form block as verification. This does not apply to the
convertible models and only
those combinations are approved. Color quantities (34,531) do not add to total production because additional units had non-standard paint or primer only. |
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Interior Trim Codes
| RPO | Color/Material |
| 19V | Black vinyl |
| 192 | Black leather * |
| 14V | Silver vinyl |
| 142 | Silver leather * |
| 26V | Dark Blue vinyl |
| 262 | Dark Blue leather * |
| 60V | Neutral vinyl |
| 65V | Medium Saddle vinyl |
| 652 | Medium Saddle leather * |
| 73V | Dark Red vinyl |
| 732 | Dark Red leather * |
* Deluxe interior in black, silver, dark blue, medium saddle, or red leather. Includes leather seat trim, wood-grain accents and lower carpet trim on interior door panels, wood-grain accents on console and special cut-pile carpeting.
1975 OEM Supplier Paint Colors
| Color | Valspar Code | PPG Code | DuPont Code | RM Code | SW Code | WA Code |
| 10 - Classic White | W041 | 8631 | 5040 | 1802 | 2517 | 3465 |
| 13 - Silver | S126 | 2518 | 43537 | 2618 | n/a | 4322 |
| 22 - Bright Blue | L1968 | 2744 | 43467 | 2797 | n/a | 4672 |
| 27 - Steel Blue | L3272 | 2747 | 43466 | 2800F | n/a | 4671 |
| 42 - Bright Green | G767 | 2749 | 43465 | 2803G | n/a | 4670 |
| 56 - Bright Yellow | Y298 | 2756 | 43464 | n/a | n/a | n/a |
| 67 - Medium Saddle | B317 | 2762 | 43463 | 2815D | n/a | 4668 |
| 74 - Dark Red | R238 | 2658 | 42810 | 2647D | n/a | 4533 |
| 70 - Orange Flame | A317 | 2764 | 43462 | 2817R | n/a | 4667 |
| 76 - Mille Miglia Red | R1127 | 2349 | 5291 | 2460 | n/a | 4147 |
GM Heritage PDF file of specifications/options/etc.
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© C1-C3 CorvetteWorld
