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Grok examples: 86 real use cases with prompts

Source-checked cases, each with what happened and the prompt.

  • Trace a check-engine code and a tank that won't fill to a stuck valve with Grok, and fix it for $120Recreated promptEvidence: Screenshots or logs

    Christopher Wipper's mechanic wanted $169 just to troubleshoot a check engine light. AutoZone's free OBD2 scanner gave code P0458 (purge control valve circuit low), and the car wouldn't take fuel: it backed up in the fill tube. With no YouTube videos for the problem, Wipper used Grok to troubleshoot step by step: the air drain case on top of the fill port was clear, but the canister close valve's solenoid was stuck closed. Wipper had the replacement part in hand in 20 minutes and fixed it for $120 in less than an hour.

    Grok · Personal · Source date:

  • Get final paychecks released within 30 minutes with an email citing state labor law, written with GrokRecreated promptEvidence: Described by poster

    After two weeks of trying to get final paychecks from a former employer, Rolo had Grok help write an email citing Illinois labor laws and the consequences for the company. Several people at the company replied within 30 minutes to say the checks would be ready for pickup. Grok was explicit that it isn't an attorney.

    Grok · Personal · Source date:

  • Get a stalled Affirm refund moving after 2.5 months of calls with an email drafted with GrokRecreated promptEvidence: Described by poster

    Rolo had been chasing a refund from Affirm for 2.5 months, with at least 5 calls averaging 20 minutes each and no result. Grok helped draft an email that cited the relevant agencies, and within an hour Affirm emailed to say the refund check was on its way.

    Grok · Personal · Source date:

  • Find a severed transmission cooler line from a roadside call with Grok, then work out a hose fix that heldRecreated promptEvidence: Described by poster

    Shan Newton was hauling a heavy load up a mountain when a huge cloud of white smoke appeared behind the truck and fluid leaked down the road. Knowing nothing about fixing cars, Newton described what they saw to Grok 4 by voice; it said the white smoke pointed to the transmission and where to look, and the transmission oil cooler line had completely severed. After a passer-by towed the truck 18 miles into town, the new hose wouldn't fit inside the factory-crimped metal pipe. Grok suggested a hose with a bigger inner diameter to fit over the pipe, estimated the pressure at 10 - 20 PSI and said metal hose clamps would be enough. The workaround worked, and Newton says the truck runs better than before.

    Grok · Personal · Source date:

  • Trace a warm fridge to a failed freezer fan and order a C$32 part with GrokRecreated promptEvidence: Described by poster

    When the bottom section of their fridge warmed to about 11–14°C, the poster worked through a process of elimination with Grok, which pointed to the freezer fan and found the cheapest well-reviewed replacement (C$32.18 with taxes). The fan arrived the next day; the poster says it was indeed the problem and the fridge is working perfectly now.

    Grok · Personal · Source date:

  • Find a second YouTube Premium you've paid for unused for a year and a half with GrokRecreated promptEvidence: Described by posterBeginner-friendly

    While getting Grok's help to tidy up too many old Google and YouTube accounts, X user Tesla Patriot found they had been paying for a second YouTube Premium account they weren't using for a year and a half. They stopped the $22-a-month charge, and Grok pointed them to calling Apple as the way to ask for a refund.

    Grok · Personal · Source date:

  • Fill in a GP online consultation form clearly and get seen in five minutes with GrokRecreated promptEvidence: Described by posterBeginner-friendly

    When home care didn't clear up their symptoms, X user David Lermarl had Grok help write the online request form for their GP practice. They say the appointment took less than five minutes, they came away with the medicine they needed, and the doctor thought the approach was great, while noting it may not work every time.

    Grok · Personal · Source date:

  • Get a laptop that won't boot after a dead battery working again step by step with GrokRecreated promptEvidence: Screenshots or logs

    After their teenager let a Dell laptop's battery die, it stopped booting. The owner, who says they know nothing about IT, sent Grok a screenshot of each screen and asked what to do next. They worked through BIOS changes, Dell's recovery tools and repair commands, and finally booted from a Windows 11 installation USB, entered the BitLocker recovery key and got into recovery. The laptop now boots normally with all files intact. At the end, Grok wrote a summary of what was wrong, what was tried and what worked, which they posted.

    Grok · Personal · Source date:

  • Size a portable solar battery for an outdoor kitchen and pizza night with GrokRecreated promptEvidence: Screenshots or logs

    An X user asked Grok to help work out their power needs for an outdoor kitchen running off a Jackery Explorer 2000 solar battery. On the night they ran lights and hosted a pizza party with a wood-fired pizza oven, cooking six pizzas, and posted screenshots of the charge left with several lights and an Alexa still running. Their verdict: 'Grok told me right!'

    Grok · Personal · Source date:

  • Find a water heater's failing check valve after other checks with GrokRecreated promptEvidence: Described by poster

    After flushing the water heater, cleaning filters and checking error codes and sensors, the poster wasn't sure what to check next and asked Grok, which said that model has a check valve that often fails. Pulling it out solved the problem; the poster says it was an $8 part and saved $800 in repairs.

    Grok · Personal · Source date:

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