Because this is the busiest season for our dealers, we think it’s a great time to revisit the operational basics that lay the groundwork for growing your trailer business.

You got into this business to sell units and take care of customers — not to referee arguments over invoices or spend your afternoon returning “just checking in” voicemails.

If your service department feels like controlled chaos, you’re not alone. It’s the most common thing we hear from owners and general managers in their first few years. And the usual advice you’ll get is some version of the same three answers: hire another service writer, raise your labor rate, or buy software. All three treat the symptom.

Here’s the thing: our team includes people who’ve spent decades running dealerships — service managers, GMs, and parts leads who managed multiple bays and product lines before they ever joined Blackpurl. Ask them where a newer owner should start improving service, and the answer is smaller than anyone expects: fix your write-up.

What is a service write-up?

A service write-up is the conversation and documentation that happens when a customer drops off a unit — what’s wrong, what you found, what it’ll cost, and when they’ll hear from you.

It sounds basic. That’s exactly why it gets rushed. But the write-up is the first domino in your service department: sloppy check-in, and your tech spends 20 minutes diagnosing what the customer could have told you in 2. Parts get ordered twice or not at all. The customer calls three times because nobody sets expectations. The invoice surprises them, they push back, and your service writer eats the difference to keep the peace.

Tighten the write-up, and the opposite happens. The tech starts working instead of guessing. The estimate holds. The customer knows when to expect a call. And you find work the customer didn’t know they needed — which is where most service revenue growth is hiding.

Build a complete write-up in 5 steps:

1. Capture the customer’s words, verbatim
2. Do a walk-around with the customer standing there
3. Write down and price everything you found
4. Make a communication promise
5. Get authorization and contact preference

1. Capture the customer’s words, verbatim

Write down what the customer says — not your interpretation of it.

Most shops get this wrong in the name of speed. “Brake issue” goes on the ticket, and the diagnostic clues walk out the door with the customer. “Makes a grinding noise when braking, worse when loaded” beats “brake issue” every single time — and your tech is the one who pays for the shorthand in the bay.

Pro Tip: Train your service writer to read the concern back to the customer before they leave. It takes ten seconds, catches misunderstandings on the spot, and shows the customer they were actually heard.

2. Do a walk-around with the customer standing there

Before the customer leaves, walk the unit together. On a trailer: tires, lights, coupler, safety chains, breakaway, wiring, floor. Two minutes.

You’re doing two things at once here. You’re checking the unit — and you’re showing the customer that you check the unit. That second part matters more than most dealers realize. It’s the difference between a repair shop and a dealership people trust with their livelihood.

One of the veterans on our team puts it bluntly: “Every service problem I was ever asked to fix in ten years started at the counter, not in the bay. The owners kept buying tools for the bay.”

The walk-around isn’t an inspection — it’s a handshake. The customer watches you care about their unit before you’ve charged them a dime.

Pro Tip: Busy mornings are when the walk-around gets skipped — and when skipping it costs the most, because there’s no slack in the day to absorb the mistakes. Protect it by staggering drop-off appointments in 15-minute slots instead of letting everyone show up at 8 a.m.

3. Write down and price everything you found

Anything the walk-around turns up — worn bearings, cracked wiring, tires at the wear bar — goes on the write-up with a price next to it.

Here’s the mistake we see constantly: the tech spots the worn bearing, mentions it to the customer at pickup, and it never makes the ticket. That’s not modesty — that’s a pay cut you’re giving yourself. Written down and priced, it’s your upsell, except it doesn’t feel like one, because the customer watched you find it. On a trailer that hauls for a living, most owners say yes to safety items. That’s revenue your team was already touching and just not writing down.

4. Make a communication promise

Give the customer a specific day: “We’ll call you by Thursday with a diagnosis.” Then keep it.

Most service complaints aren’t about the repair — they’re about silence. The customer doesn’t know if you’ve looked at their unit, doesn’t know what it’ll cost, calls, gets put on hold, calls again. By pickup, they’re irritated before they see the bill. A customer who gets one proactive call will forgive almost anything. A customer who has to chase you will forgive almost nothing.

Pro Tip: If your DMS can text customers status updates — the way Blackpurl 2’s integrated texting does — that promise gets a lot easier to keep at scale. But the discipline comes first. A text you never send is worth the same as a call you never make.

5. Get authorization and contact preference

Before the customer walks out, answer two questions: How much work can you do without calling them? And do they want a call or a text?

A pre-authorized amount (even a modest one) keeps small jobs moving without a phone tag. A contact preference means your updates actually land. Both take fifteen seconds to ask and save hours across a busy week.

How does a better write-up grow revenue?

Three ways — and none of them require selling harder.

Found work. When your team inspects every unit at check-in, walk-around findings add meaningful dollars to a large share of repair orders. It’s the most natural revenue growth in the building because the customer saw the problem with their own eyes.

Fewer comebacks. A comeback is the most expensive job your shop will ever do. You pay the tech twice, you lose a bay, and you burn trust. Accurate write-ups mean accurate diagnosis, which means jobs get fixed right the first time.

Estimates that hold. When the write-up is complete, the estimate is real. Customers who trust your estimate approve work faster and argue less. Speed of approval is speed of revenue.

Where do you actually start this week?

Don’t announce a new initiative. Do this instead:

1. Write the five steps above on a card. Tape it at the service counter.
2. Watch the next ten write-ups happen. Stand next to whoever does them. You’re not checking on your people — you’re learning what your process actually looks like today, not what you assume it looks like.
3. Track two numbers for 30 days: average dollars per repair order, and inbound “any update?” calls per day. A tally sheet works.
4. Compare after 30 days. Dollars per RO should climb from found work, and the phone should quiet down as expectation-setting kicks in. Those two numbers move weeks before your monthly financials do.

Once the write-up is solid, you’ve earned the right to fix the next thing — scheduling, parts pre-pull, tech dispatch. But not before. A dealership that runs on guesses fixes symptoms. A dealership that runs on a process — and on numbers instead of gut feel — fixes causes.

Pro Tip: If you’re tracking dollars per RO on a tally sheet today, that’s a fine start. A connected DMS like Blackpurl 2 does that math for you across every repair order automatically — so the 30-day check-in becomes a glance at a dashboard instead of an afternoon with a calculator.

Best practices for a write-up process that sticks

Don’t let the process live in someone’s head. If your best service writer quit tomorrow, would the write-up leave with them? Write it down. Put it in whatever system you use — paper or software — so it survives people.

Under-promise, over-deliver on communication. “We’ll call Thursday” only works if Thursday happens. It’s the oldest rule in service for a reason.

Show, don’t push, on found work. Point at the tire. Let the customer decide. They will, more often than you think.

Keep it consistent on the busiest days. A process you only follow when it’s convenient isn’t a process. It’s a suggestion.

Fix one process, then the next

Here’s the stance we’ll leave you with: chaos in the service department isn’t a stage of growth you wait out. It’s a process nobody ever wrote down.

Improving service isn’t a grand overhaul — it’s fixing the first domino and letting the wins fund your confidence for the next one. Start with the write-up. Track two numbers. Give it 30 days. The dealers we work with who’ve done this rarely go back, because once the shop runs on a process, chaos stops being something anyone misses.