Why does the gas pump keep shutting off when I fill my Cadillac Brougham, and why won't it shift?

Short answer: When the pump keeps clicking off on a Brougham, the tank's air can't get out fast enough. Check the vent and vapor canister lines and the filler neck. Some owners just fill on the slow setting. A Brougham that won't shift into 2nd or 3rd needs a fluid check and a good independent transmission shop. For oil, owners use 5W-30 with a current API rating.

Symptom: The pump nozzle keeps shutting off after a few cents, or the transmission won't shift into 2nd or 3rd and makes a noise.

What to check first

1. Try filling on the pump's slowest setting.
2. Look for kinked, crushed or blocked vent hoses near the tank and filler.
3. Check the transmission fluid level and smell with the engine running.
4. Ask when the transmission was last serviced.
5. Have a car with unknown history inspected and its fluids changed.

Likely causes

1. Blocked tank vent or vapor canister line. As gas goes in, air has to escape through a vent line. If it's kinked or blocked, the air pushes back and trips the nozzle.
2. Filler neck issue. A rusted or kinked filler tube can make fuel back up.
3. Transmission service overdue or internal problem. A transmission that won't shift into 2nd or 3rd needs a fluid check and a transmission shop diagnosis.

What it usually costs

Owners in these threads didn't post prices.

Is it safe to keep driving?

Filling slowly works around the fuel problem, but if you smell gas or see a leak at the filler, fix it. A transmission stuck in 1st makes highway driving unsafe and can overheat the transmission.

DIY or shop?

Vent hoses and fluid checks are DIY. Filler neck replacement and transmission diagnosis are shop work.

Recalls, bulletins and complaints in plain words

• Recalls: NHTSA lists 13 recall(s) for the Cadillac Brougham in these years, and none match this problem. Check your VIN at nhtsa.gov/recalls. If your car is part of a recall, the dealer fixes it for free.
• Plain words: The complaint count below shows how often owners reported problems that mention these words to NHTSA. A count is not proof of a defect.
• NHTSA complaints: 3 keyword-matched complaints for Cadillac Brougham 1987–1992 (of 37 unique complaints queried, NHTSA complaints API by model year, queried 2026-10-30; keywords: fill, tank, filler, transmission, shift) (NHTSA returned no data for 11 model-year queries). This counts complaints that mention these words. It is not a defect finding.

What owners report

• In Can't fill up 1991 Cadillac Brougham on Car Talk, a 1991 Brougham kept shutting off the pump after about 70 cents of gas. The owner had checked the vapor canister and blown out its hose, and the gas gauge always read full. Members asked whether it filled on the pump's slow setting, and a 1990 owner said theirs had done it for years and they just fill slowly.
• In 1990 Cadillac Brougham - Transmission issues on Car Talk, a 1990 Brougham wouldn't shift into 2nd or 3rd and made a noise. Members asked when the fluid was last serviced and suggested asking local mechanics for the best independent transmission shop for a diagnosis.
• In 1992 Cadillac Brougham - oil on Car Talk, a '92 Brougham owner asked what oil to use; the manual said SAE 5W-30 rated API SG. A member said any brand is fine, to use the current API rating since SG is obsolete, and to have a car with unknown history fully inspected and the fluids changed.

Quick tip

On a car this old, change every fluid when you buy it. It's cheap insurance for a transmission that may never have been serviced.

Vehicle focus: Cadillac Brougham (rear-drive), 1987-1992.

Safety / mechanic note

Fuel leaks and transmission faults are safety items. Verify with a mechanic.