Rocky's loaner pick up truck is a 1979 GMC Sierra Grande with the Street Coupe Package. This truck is also equipped with an aftermarket steering wheel.
Angel has the State Flag of Texas on his apartment wall.
Jim stops to let Angel use the restroom at 22nd Street Landing and a "Reserved parking for Frank Hall" sign is visible. Frank operated a restaurant at the location but was an American pilot during World War II. Frank was shot down multiple times over Europe during the war but managed to evade capture and continue flying.
While impersonating a state industrial inspector, Jim makes a reference to activist Ralph Nader in an attempt to justify a company site visit under a fictitious consumer protection law.
To save Angel from torture via dental drill, Rockford flips the main electric breaker--the power goes off and the drill stops working. But that drill runs on air pressure, it would continue to work perfectly for a good while, from the pressurized air stored in the compressor tank.