Launch price$14 $7$29 $17$39 $27Ends in --

Gus’s plain-English car care ebooks

Car trouble?
Start here.

That light. That noise. That leak.
Know what to check before you pay a shop.

From $7One-time payment

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Instant PDF download · Delivery guarantee

Grandpa Wrench plugging a code reader into a pickup's dashboard socket
Read the code first.
Buy parts later.— Gus

Small books. Useful answers.

THE GLOVE BOX COLLECTION / 01—03
1 purchase for the whole family.Pass it to the people you care about.
Gus in his red cap, leaning on his pickup
Gus / Grandpa Wrench

01About me

A little less worry.
A lot more know-how.

I'm Gus, the grandpa in the red cap from the Grandpa Wrench channel. My job is simple: tell you what your car is trying to tell you, in words you'd use at the kitchen table.

On the channel I explain one problem at a time. In these books it's all in order: what each light and symptom means, what you can check safely in your driveway, what it usually costs, and when it's time to let a mechanic take over.

“A warning light is the start of a conversation, not a bill. Read the code before you buy the part.”— Gus
Visit the YouTube channel
233pages across the 3 books
26chapters in plain English
1 purchasefor the whole family: share it with your kids, your spouse and anyone who drives
11printable checklists and charts

02Real questions. Clear chapters.

What drivers ask in the comments

These are real questions people leave under car videos on YouTube, copied word for word. Each one has its answer in a chapter.

Sound familiar?
The answer has a page.
01Level 1 · Chapter 4«When removing and replacing a battery is it normal for the check engine light to come on.?»

What a battery disconnect does to the computer, what to save first and why the light can come back.

02Level 1 · Chapter 2«What does it mean if that light is solid yellow?»

Steady versus flashing, the gas cap check and how to read the code with an inexpensive reader.

03Level 1 · Chapter 3«Should’ve mentioned that tire pressure warning can falsely trigger in cold conditions»

Why cold mornings trigger the light, how to check cold pressure and which number to use.

04Level 2 · Chapters 5 and 7«My car stalled while I was driving, and when I tried to re start it, the engine cranks freely. Could it be the crankshaft position sensor?»

Crank-no-start versus no-crank, what each sensor does and what to test before buying one.

05Level 3 · Chapter 3«Every specialist has told me not to touch my SAAB 9-3 'sealed for life' autobox. [...] What would you do?»

What "lifetime" fluid really means and how to decide on a service for a high-mileage transmission.

06Level 3 · Chapter 12«How do you find and judge an honest mechanic?»

How to find a shop before you need one, read an estimate line by line and say no to an upsell.

03The glove box collection

Pick where to start.

Each book works on its own. If you want the whole plan to keep your car running for years and to deal with any shop, Level 3 is the most complete.

What That Light Means — ebook cover
DIGITAL BOOK · PDF

Level 1 / Basic

What That Light Means

Understand the warning lights.

  • Know which lights mean stop now
  • Free checks before you pay a shop
  • Reset without losing the clues
  • Share it with your family
What’s in this book

Every warning light and which ones mean pull over now, the check engine and tire pressure lights, resetting the computer the right way, a 10-minute monthly check and safe household tricks for glass and battery terminals.

50 pages

Launch price

$7$14

Save $7

Ends in --

One-time payment
Instant PDF download

Follow the Clues — ebook cover
DIGITAL BOOK · PDF

Level 2 / Intermediate

Follow the Clues

Track down a symptom.

  • Match a noise or smell to its likely cause
  • Coolant loss and overheating, step by step
  • Printable symptom diary and sensor chart
  • Share it with your family
What’s in this book

Diagnosis by symptom: noises, smells, smoke and puddles, disappearing coolant and overheating, shakes, rough idle and no-starts, lost power, every engine sensor and how to describe it all to a mechanic.

75 pages

Launch price

$17$29

Save $12

Ends in --

One-time payment
Instant PDF download

1 purchase for the whole familyDelivery guaranteeYours to download & keep

04Grandpa Wrench's Club

Your car question isn't in the books? Ask it and I'll explain it.

Join the club · $5.99/month

Every Monday a new guide of about 20 pages comes out. The members pick the topic: you ask, everyone votes and the top one comes out that week.

  • Every guide published so far, open from day one
  • A new guide every Monday
  • Ask for your topic and vote on the others
  • Read on your phone or download the PDF
  • Share the guides with your family
01 You ask.02 Members vote.03 Monday: your guide.

05Before you approve the repair

What would a shop charge you?

Reference prices in the United States. Your shop may charge more or less, but they help you compare: the books show you what to check yourself first and what to ask before you approve a repair.

THE COST OF NOT KNOWING
01

Check engine light diagnosis at a shop (labor only, before any repair)

$122 – $179RepairPal estimator, updated Sep 2026Read: What That Light Means · $7
02

Coolant leak diagnosis (labor only, before any repair)

$60 – $88RepairPal estimator, updated Sep 2026Read: Follow the Clues · $17
03

Maintenance, repairs and tires for a new car

11.04 cents per mile (about $1,656 a year at 15,000 miles)AAA, Your Driving Costs 2025Read: Make It Last · $27

The books do not replace a qualified mechanic when you need one (brakes, steering, airbags, fuel leaks, overheating, a flashing check engine light). They help you do the checks you can do safely, describe the problem clearly and avoid paying for parts you did not need.

Is this for you?

  • A warning light came on and you want to know if you can keep driving
  • You are tired of paying for parts that did not fix anything
  • You want your car to last for years and know what each job costs
  • You like things explained in plain English, short and to the point
When you need something else
  • You are a professional mechanic looking for factory repair procedures
  • Your brakes, steering or airbags are acting up: that is a job for a shop today

06Open the book

Take a look inside

Real pages from the books: numbered steps, clear charts and checklists you can print and keep in the glove box.

01 What That Light Means · page 9
02 What That Light Means · page 44
03 Follow the Clues · page 48
04 Follow the Clues · page 67
05 Make It Last · page 8
06 Make It Last · page 19
1 / 6
What That Light Means · page 9

What That Light Means · page 9

Buying is this easy.

A book in your pocket.
An answer when you need it.

  1. 01

    Pick your book

    Tap the button on the book you want. Stripe's secure checkout page opens.

  2. 02

    Pay with your card

    You type your card on Stripe's page. We never see or keep your card details.

  3. 03

    Download it right away

    You come back here and download the PDF. It also arrives by email. Read it on your phone, tablet or computer, or print it.

Delivery guarantee

If your book doesn't arrive, won't open or your download link expired, write to us and we'll send it again within 24 hours.

grandpawrench@practicguides.com

One more thing…

Frequently asked questions

Can I share it with my family?

Yes. One purchase is for the whole family: pass it to your kids, your spouse or anyone else who drives. The only thing not allowed is selling it or posting it online.

I'm not good with computers. Is it complicated?

No. You tap the button, pay on the secure page, and the download button appears when you come back. It also comes by email. It opens like any PDF on your phone. If anything goes wrong, write to us and we'll help.

Is it a subscription?

No. The books are a one-time payment and they're yours to keep. The only monthly thing is the club, which is separate and optional.

Do I need tools?

No special tools. Most checks need your eyes, a tire gauge and a flashlight. Where an inexpensive tool helps, like a code reader, the book says what it does and what it costs.

Will it work for my car?

The books cover everyday cars, SUVs and pickups. Wherever details depend on the make and model, they tell you exactly what to look for in your owner's manual. Hybrid and electric owners get a clear note on what to leave alone.

Can I print it?

Yes. The checklists and charts are made to print and keep in the glove box.

What if it doesn't arrive or won't open?

Write to us and we'll resend it within 24 hours. That's our delivery guarantee.

Next time a light comes on, you'll know what to do.

Choose my book

Secure payment with Stripe · Instant download · One-time payment · Share it with your family