GMC Motorhome Basic Information

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>> GMC Motorhome Model Year Availability & Floor Plans Produced

Click here to view pdf. (Source: GMCMI)


>> GMC Motorhome Floor Plan Diagrams

23′ GMC Motorhome Floor Plan Diagrams (Source: GMCMI)

26′ GMC Motorhome Floor Plan Diagrams (Source: GMCMI)


>> GMC Motorhome Vehicle Identification Number Decoding

VIN Decoding Example TZE167V102359

T = Manufactured by General Motors

Z = 3 Axle Motorhome

E = Gasoline Engine

1 = Interior Code
“1” – GM Interior from 1975 to 1978
“0” – GM Interior from 1973 to 1974
“2” – Twin Bed Interior from 1976 to 1977
“3” – Transmode(sold without interior or windows)

6 = Model
“6” – Model 260(26 feet long)
“3” – Model 230(23 feet long)

7 = Model Year(1977)

V = Manufacturing Plant Code
“V” – Pontiac, Michigan

1 = First Digit of Production Series Number – All production started with “1”

0 = Since total production was less than 13,000, all GMC Motorhomes had a zero in this position

2359 = Production sequence number


 >> Service Parts Identification Label

GMCMH Service Parts Identification Label
Label in glovebox of GMC upfitted interiors identifies the interior finish model as:
641
Kingsley
681
Glenbrook
683
Edgemont
685
Coca Cola
690
Sequoia
692
Painted Desert
693
Glacier
695
Canyon Lands
696
Eleganza I
698
Palm Beach

>> GMC Motorhome Production

Production of Motorhome Models
by Model Year
Model
Year
GMC Interiors
Transmodes

Total
23 foot
26 foot
23 foot
26 foot
1973
461
1,598
2,059
1974
168
1,496
1,664
1975
1,196
36
425
1,657
1976
2,413
549
298
3,260
1977
1,694
253
455
2,402
1978
689
178
1,012
1,879
Total
629
9,086
1,016
2,190
12,921
Source – GMCMI Newsletter, Fall 1982.
Submitted by Zachary Zehnacker.

Click here to view pdf.


>> GMC Motorhome Advertised Gross Vehicle Weight

GMC Motorhome
Advertised Gross Vehicle Weight
by Year
23′ GMC Motorhome
Year(s)
 Front  Rear
Total
1973-77
 4,000  7,000
10,500
1978
 4,200  7,000
11,200
26′ GMC Motorhome
Year(s)
 Front  Rear
Total
1973 Early*
4,000 7,000
10,500
Late 1973-1974
4,200 7,000
11,200
1975-1977
4,200 7,500
11,700
1978
4,500 8,000
12,500
*1973 Early = up to ~V1002400
Source: Bill Bryant

Click here to view pdf.


>> GMC Motorhome Scale Weights

Click here to view pdf. (Source: Unknown)


>> GMC Motorhome Dimensions

GMC Motorhome Dimensions
Track
Front
75.28 in
Rear
85.12 in
Wheelbase
Model 230
140 in
Model 260
160 in
Length (Inc. Opt. Spare Tire)
Model 230
23 ft – 9 in
Model 260
26 ft – 9 in
Length (Inc. Opt. Trunk)
Model 230
24 ft – 8 in
Model 260
27 ft – 8 in
Width
96 in
Height
8 ft – 1 in
with air conditioner
9 ft – 2 in
Front Overhang
All Models
42 in
Rear Overhang
Model 230
69 in
Model 260
89 in
Interior Ceiling Height
76 in
Source:1973 GMC Motorhome
Owner’s Manual

Click here to view pdf.


>> GMC Motorhome Capabilities

GMC Motorhome Capabilities
Fuel System
two – 25 gal tanks
 Cooling System
21 quarts
Engine Oil
5 quarts (6 quarts including filter)
 Transmission
4 quarts –
drain & refill
10 quarts after complete overhaul
 Final Drive (Differential)
4 pints
Power Steering Pump
1 pint
 Power Steering System
1 1/2 quarts
LP Gas Tank
44.5 pounds (standard)
65.0 pounds
(optional)
 Living Area
Water Tank
40 gallons
Holding Tank
40 gallons
Hot Water Tank
6 gallons
Source: 1973 GMC Motorhome
Owner’s Manual

Click here to view pdf.


>> GMC Motorhome Engine

GMC Motorhome Engine
1973 to 1976 Model Years
Displacement
455 cubic inches
Carburetor 4 barrel
Compression Ratio
8.5:1
Bore
4.125 in
 Stroke
4.250 in
Firing Order
1-8-4-3-6-5-7-2
Dwell
30 degrees
Timing
8 degress BTDC @ 1100 RPM
Slow Idle Screw
600 RPM in Drive
 Fast Idle Screw
1100 RPM in Park or Neutral
Spark Plugs
AC R45S
Spark Plug Gap
.040 in.
Valve Lash
Hydraulic
Idle Mixture
Do Not Remove Caps
Fuel Requirements
91 Octane or Higher
Source: 1973 GMC Motorhome
Owner’s Manual

Click here to view pdf.


>> GMC Motorhome Exterior Paint Codes

1973-1975 Exterior Paint Codes (Source: Unknown)

1976-1978 Exterior Paint Codes (Source: Unknown)


>> GMC Motorhome Pricing

1977 – 26 ft Price List with Options (Source: Bill Bryant)


 >> Other Items of Interest

GMC Motorhome Log (Unknown)

VIN Decoding (Source: What’s in a Number? by Dave Greenberg | GMC Motorhome Marketplace, March 1997)

1975 Warranty Information (Source: Bill Bryant)

X7523-A | 1975 Emission Control Systems Information and Warranty Folder
(with engine certified for 1975) (Source: Bill Bryant)

X7726-A | 1977 Warranty Card (Source/Scan: Emery Stora)

X8024A | 1980 Drivers Directory of GMC Motorhome Service Representatives (Source: Bob & Marlys Drewes)

Motoroamer’s Pre-Flight Check List (Source: Bill Bryant)