GM New Look Bus - Model Naming

3rd & 4th generation
6 = Detroit Diesel 6V71
6 = Detroit Diesel 6V92TA1
8 = Detroit Diesel 8V712

• Two digits.

• "N" omitted for 1st & 2nd generation

1. The Detroit Diesel 6V92TA was available on 40-foot (12.19 m) buses as an alternative to the Detroit Diesel 6V71 and 8V71.
2. Only 40-foot (12.19 m) buses were available with an 8V71 engine.
3. The 33 passenger model was not offered in a Suburban version.

• Tail lights were housed in streamlined nacelles modeled after afterburners.
• Side roof signals were in geometric chrome strips.
• "GM" logo was on a plaque with a black background.
• In the first year of production, buses were built with pantograph wipers instead of single arm wipers.

• 4516: 35 ft (10.67 m) × 102 in (2.59 m)
• 4517: 35 ft (10.67 m) × 96 in (2.44 m)
• 5301: 40 ft (12.19 m) × 102 in (2.59 m)
• 5302: 40 ft (12.19 m) × 96 in (2.44 m)

• 4501: 35 ft (10.67 m) × 96 in (2.44 m)
• 5301: 40 ft (12.19 m) × 96 in (2.44 m)

• Tail light nacelles were removed.
• Side roof signals were placed in small bullet-pods.

• 4518: 35 ft (10.67 m) × 102 in (2.59 m)
• 4519: 35 ft (10.67 m) × 96 in (2.44 m)
• 5303: 40 ft (12.19 m) × 102 in (2.59 m)
• 5304: 40 ft (12.19 m) × 96 in (2.44 m)

• 4502: 35 ft (10.67 m) × 96 in (2.44 m)
• 5302: 40 ft (12.19 m) × 96 in (2.44 m)

• Tail lights were enlarged and given less flair. Because of new FMCSA regulations, three roof head and tail lights, commonly called "Michigan markers", were added as standard equipment (they had been optional on first- and second-generation New Looks). First-generation New Looks had these lights installed in a roof-mounted bracket, called "Manhattan style"; thereafter each light was mounted directly on roof.
• Third clearance light added at top centre on either side, previously only at top corners. Bullet-pods of second-generation New Looks were eliminated.
• Alternator-based electrical system introduced; previous generations used DC generators.
• Slight update of driver's instrument panel: Voltmeter replaced previous generator warning light; separate left and right turn signal indicators replaced previous single DIR. SIGNAL light.
• The logo was changed to "GMC" over a silver background.
• The GM 8V71 engine became an option on 40-foot buses.
• From this point on, only the 40 ft (12.19 m) transit model would be available in a 102 in (2.59 m) width.

• 3301: 29 ft (8.84 m) × 96 in (2.44 m)
• 4521: 35 ft (10.67 m) × 96 in (2.44 m)
• 5305: 40 ft (12.19 m) × 102 in (2.59 m)
• 5306: 40 ft (12.19 m) × 96 in (2.44 m)

• 4503: 35 ft (10.67 m) × 96 in (2.44 m)
• 5303: 40 ft (12.19 m) × 96 in (2.44 m)

• Same front as the third generation.
• For units built for American operators, the exhaust system was shifted from below the bus to the left of the rear window. Also used by Canadian operators; called Envoronmental Improvement Package.
• A ventilation system on the right of the rear window became a popular option.
• Roof ventilation/escape hatches introduced as an option from 1974, also very popular.
• NEXT STOP lights introduced 1976-77; allows bell to ring only once for each stop.
• Starting in 1981, the 6V92TA engine became an engine option for the 5307 transit and 5304 suburban model.
• 5309 and 5310 were only sold to the New York MTA in 1972-73, as a variant of the 5307.

• 3302: 29 ft (8.84 m) × 96 in (2.44 m)1
• 4523: 35 ft (10.67 m) × 96 in (2.44 m)
• 5307: 40 ft (12.19 m) × 102 in (2.59 m)
• 5308: 40 ft (12.19 m) × 96 in (2.44 m)
• 5309: 40 ft (12.19 m) × 102 in (2.59 m)2
• 5310: 40 ft (12.19 m) × 102 in (2.59 m)3

• 4504: 35 ft (10.67 m) × 96 in (2.44 m)
• 5304: 40 ft (12.19 m) × 96 in (2.44 m)

1. The 3302 ceased production in 1973.
2. This model was sold only to the New York MTA and featured perimeter seating.
3. This model was sold only to the New York MTA and featured forward-facing suburban seating.