For model year 1933, Pontiac introduced the all-new Economy Eight Series 601 with the 223.4 cu in (3.7 L) Silver Streak Straight-8 using a Carter one-barrel carburetor and shared the slanting vee-type grille that concealed the radiator used on all GM products, and was built on the GM A platform shared with the Chevrolet Master.

1933 was also the first year all GM vehicles were installed with optional vent windows which were initially called “No Draft Individually Controlled Ventilation” later renamed "Ventiplanes" which the patent application was filed on Nov. 28, 1932.

Production began January 1, 1934 and a radio, called the "Air Chief" was on the list of options to include a front bumper, cigar lighter, clock, spotlights and a folding rear trunk rack.

New standard features included retractable front and rear center armrests installed in the seats on mohair cloth upholstery.

The independent front suspension was something GM called "Knee-Action" using trailing arms, an automatic choke for the carburetor, and a pressurized cooling system for the larger 232.2 cu in (3.8 L) engine with a 6.5:1 compression ratio.

[1] The 1937 Pontiac Deluxe Eight Series 28 was the first year all GM vehicles offered an optional "Dual Safety Electric Fan Windshield Defroster" combined with a passenger compartment heater.

This device used an additional heater core installed behind the dashboard that rerouted coolant from the radiator to provide the necessary heat that would then be directed against the inside windshield surface.

This allowed extra room needed so that a third passenger could be accommodated on the front bench seat with a manual transmission column shift.

The options list continued to grow with such items as a tenite shift lever ball for US$0.50 ($11 in 2023 dollars [3]), two passenger compartment heater choices for either the Master or Deluxe trim package, fog lights, license plate frames, seat covers, floor mats, cigar lighters and the rear view mirror was still an extra cost item at US$2.95 ($64 in 2023 dollars [3]).

[1] 1939 offered appearance changes as usual, such as different types of Indian hood ornaments for the Deluxe Eight and the entry-level Quality Six.

In 1940 Pontiac continued offering the Deluxe Eight Series 28 which includes an engine and transmission imported from Italy on the "B" platform, and the Torpedo on the C-platform.

[1] The horseshoe shaped center grille had horizontal bars and a circular emblem in the middle of the upper main surround molding.

The Streamliner station wagon ranged from $1,265 for a base Six to $1,340 for a Chieftain Eight, making it Pontiac's most expensive model.

Styling highlights of Pontiacs were wraparound bumpers, a massive 14-blade grille, new nameplates and concealed safe-light parking lamps.

[2] Ranging in price from $1942 for a standard Six to $2,047 for a Deluxe Eight, Streamliner station wagons continued to be the most expensive Pontiac model.

[2] Hoods and fenders were protected by an inverted steer's horn shaped bar incorporating a die cast plate with indianhead relief.

[2] Streamliner station wagons ranged in price from $1,992 for a standard Six to $2,111 for a Deluxe Eight, again making them Pontiac's most expensive model.

[2] In 1948 a new Pontiac styling included triple "Silver Streaks," a horizontal grille theme with vertical shaft, and round taillights.

[2] Deluxe models were distinguished by spear moldings on front fender, bright gravel guards, and chrome plated wheel discs on all cars except wagons.

[2] Station wagon prices ranged from $2,364 for a standard Six to $2,490 for a Deluxe Eight, making them Pontiac's most expensive model.

Chevrolet would not introduce Powerglide until 1950, Ford FordoMatic until 1951 (Lincoln would start buying Hydramatics from GM in 1949), and Chrysler, PowerFlite on Imperials, until 1953.

[2] Since Hydramatic was still only optional on Cadillac and Oldsmobile, and Dynaflow optional on Buick Roadmaster, given the total sales of Cadillac (50,619), Oldsmobile (173,661) and Buick Roadmaster (80,071), and the fact that Dynaflow was only introduced in the middle of the model year, this implies that probably over 40% of all cars sold with automatic transmissions in 1948 were Pontiacs.

[2] Standard coupes, sedans, and wagons were characterized by an absence of beltline trim along with use of rubber gravel guards and painted headlight rims.

[2] Streamliner station wagons continued to be the most expensive Pontiac model, ranging in price from $2,543 for a standard Six to $2,690 for a Deluxe Eight.

[2] The price of Streamliner station wagons fell to a range of $2,264 for standard Sixes to $2,411 for Deluxe Eights[2] due to the fact all-metal construction did not require final work be done at Hercules Body Company or Iona Manufacturing.

[2] In its final year, the Streamliner station wagon continued to be Pontiac's most expensive model, ranging in price from $2,470 for a standard Six to $2,629 for a Deluxe Eight.